Marine Life Koh Chang (ASIAN PACIFIC)
Discover Koh Chang’s marine life, coral reefs and dive sites we offer daily diving and snorkelling trips to the most popular sites in Mu Koh Chang National Park. There are about 21,000 species of fish on our planet. To classify all these creatures into categories one usually uses the characteristics of the animals. In order to discover as much of the underwater world as possible, we dive slowly and calmly with good buoyancy along the coral reef. At our dive sites, we find different fish families, to distinguish them we have to catalogue the different characteristics of the animals like shape, colour, size, etc. If we can’t identify a fish, we make a sketch and compare it in reference books or ask a specialist. It is important as a snorkeler or diver to note the different changes and report them accordingly. We have compiled an overview of the marine life in Koh Chang for you here.
Mammals
Mammals include humans and all other animals that are warm-blooded vertebrates (vertebrates have backbones) with hair. They feed their young with milk and have a more well-developed brain than other types of animals.

Dugong Dugon
SIZE: 4m / RARITY: Rare / BEHAVIOR: Indifferent / AGE: 73 Years

Chinese white Dolphin
SIZE: 3,2m / RARITY: Uncommon / BEHAVIOR: Fearfull / AGE: 50 Years
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Irrawaddy Dolphin
SIZE: 2,8m / RARITY: Rare / BEHAVIOR: Curious / AGE: 28 Years
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Spinner Dolphin
SIZE: 2,4m / RARITY: Uncommon / BEHAVIOR: Fearful / AGE: 50 Years
Sharks & Rays
Sharks and rays are some of the most enigmatic and misunderstood creatures of the ocean. They are crucial for the health of our planet. Sharks and rays help the world, from fighting climate change to sharing food with their neighbors to growing phytoplankton.
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Whale Shark
SIZE: 18m / RARITY: Rare / BEHAVIOR: Indifferent / AGE: 100 Years

Grey Reef Shark
SIZE: 2,6m / RARITY: Common / BEHAVIOR: Curious / AGE: 25 Years / DANGEROUS: Bite

Blacktip Reef Shark
SIZE: 2m / RARITY: Uncommon / BEHAVIOR: Curious / AGE: 12 Years / DANGEROUS: Bite

Tawny Nurse Shark
SIZE: 3,2m / RARITY: Uncommon / BEHAVIOR: Curious / AGE: Years / DANGEROUS: Bite
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Eagle Ray
SIZE: 1,5m / RARITY: Rare / BEHAVIOR: Indifferent / AGE: Years

Blue spottet maskray
SIZE: 0,7m / RARITY: Rare / BEHAVIOR: Indifferent / AGE: Years
Crevalle jack
The crevalle jack (Caranx hippos), also known as the common jack, black-tailed trevally, couvalli jack, black cavalli, jack crevale, or yellow cavalli is a common species of large marine fish classified within the jack family, Carangidae. The crevalle jack is distributed across the tropical and temperate waters
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Giant Travally
SIZE: 1,7m / RARITY: Rare / BEHAVIOR: Fearful / AGE: 20 Years

Golden Travally
SIZE: 1,2m / RARITY: Uncommon / BEHAVIOR: Curious / AGE: 20 Years
Batfishes & Coastal Fishes
Coastal fish, also called inshore fish or neritic fish, inhabit the sea between the shoreline and the edge of the continental shelf. Since the continental shelf is usually less than 200 metres deep, it follows that pelagic coastal fish are generally epipelagic fish, inhabiting the sunlit epipelagic zone. Coastal fish can be contrasted with oceanic fish or offshore fish, which inhabit the deep seas beyond the continental shelves.

Longfin Batfish
SIZE: 0,7m / RARITY: Uncommon / BEHAVIOR: Curious

Great Baracuda
SIZE: 1,7m / RARITY: Uncommon / BEHAVIOR: Indifferent / DANGEROUSNESS: Bite

Yellow Tail Baracuda
SIZE: 1,4m / RARITY: Uncommon / BEHAVIOR: Curious
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Chevron Barracuda
SIZE: 1,2m / RARITY: Uncommon / BEHAVIOR: Indifferent

Keeltail Needlefish
SIZE: 0,6m / RARITY: Common / BEHAVIOR: Fearful

Redbelly Yellowtail Fusilier
SIZE: 0,6m / RARITY: Uncommon / BEHAVIOR: Fearful
Coral Reef Fish’s
Coral reef fish are fish which live amongst or in close relation to coral reefs. Coral reefs form complex ecosystems with tremendous biodiversity. Among the myriad inhabitants, the fish stand out as colourful and interesting to watch. Hundreds of species can exist in a small area of a healthy reef, many of them hidden or well camouflaged. Reef fish have developed many ingenious specialisations adapted to survival on the reefs.
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Coral Rabbitfish
SIZE: 0,4m / RARITY: Uncommon / BEHAVIOR: Indifferent
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Clarks Anemonefish
SIZE: 0,15m / RARITY: Common / BEHAVIOR: Indifferent AGE: 14 Years

Fire Clownfish
SIZE: 0,15m / RARITY: Common / BEHAVIOR: Indifferent
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Skunk Clownfish
SIZE: 0,15m / RARITY: Common / BEHAVIOR: Indifferent AGE: 14 Years
Damselfishes
Damselfishes comprise the family Pomacentridae except those of the genera Amphiprion and Premnas, which are the anemonefishes. The largest can grow up to 36 cm (14 in) long, but most species are much smaller. While most are marine, a few species inhabit the lower stretches of rivers in fresh water. Most damselfish species have bright colors or strongly contrasting patterns.
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Scissortail Sergeant
SIZE: 0,2m / RARITY: Plentiful / BEHAVIOR: Indifferent
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Domino Damselfish
SIZE: 0,14m / RARITY: Uncommon / BEHAVIOR: Aggressive
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Sapphire Damsel
SIZE: 0,11m / RARITY: Uncommon / BEHAVIOR: Indifferent
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Black-bar Chromis
SIZE: 0,06m / RARITY: Uncommon / BEHAVIOR: Fearful
Anthias and Cardinalfishes
Cardinalfishes are a family, Apogonidae, of ray-finned fishes found in the Atlantic, Indian, and Pacific Oceans; they are chiefly marine, but some species are found in brackish water and a few (notably Glossamia) are found in fresh water. A handful of species are kept in the aquarium and are popular as small, peaceful, and colourful fish. The family includes about 370 species.
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Stocky Anthias
SIZE: 0,2m / RARITY: Plentiful / BEHAVIOR: Indifferent
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Purple Anthis
SIZE: 0,12m / RARITY: Common / BEHAVIOR: Indifferent

Yellow-striped cardinalfish
SIZE: 0,11m / RARITY: Uncommon / BEHAVIOR: Indifferent
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Pajama Cardinalfish
SIZE: 0,08m / RARITY: Rare / BEHAVIOR: Indifferent
Squirrelfishes
The squirrelfish is a silvery red, sea fish with orange-gold body stripes. There are about 150 species of squirrelfish, their most distinguishing characteristics are their large eyes and the long third spine of the anal fin. It lives in coral reefs in tropical and warm temperate seas and eats zoobenthos.

Blackfin Squirrelfish
SIZE: 0,35m / RARITY: Uncommon / BEHAVIOR: Indifferent
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Doubletooth Soldierfish
SIZE: 0,3m / RARITY: Common / BEHAVIOR: Indifferent

Threespot Squirrelfish
SIZE: 0,27m / RARITY: Common / BEHAVIOR: Indifferent
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Crown Squirrelfish
SIZE: 0,17m / RARITY: Common / BEHAVIOR: Indifferent
Wrasses
The wrasses are a family, Labridae, of marine fish, many of which are brightly colored. The family is large and diverse, with over 600 species in 81 genera, which are divided into 9 subgroups or tribes. They are typically small fish, most of them less than 20 cm long, although the largest, the humphead wrasse, can measure up to 2.5 m. They are efficient carnivores, feeding on a wide range of small invertebrates.

Triplrtail Wrasse
SIZE: 0,45m / RARITY: Uncommon / BEHAVIOR: Fearful

African Coris
SIZE: 0,4m / RARITY: Uncommon / BEHAVIOR: Fearful

Sling-jaw Wrasse
SIZE: 0,54m / RARITY: Common / BEHAVIOR: Indifferent

Pastel Ringwrasse
SIZE: 0,5m / RARITY: Uncommon / BEHAVIOR: Fearful
Snappers
Snappers are a family of perciform fish, Lutjanidae, mainly marine, but with some members inhabiting estuaries, feeding in fresh water. The family includes about 113 species. Some are important food fish. One of the best known is the red snapper.
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Emperor Red Snapper
SIZE: 1,16m / RARITY: Uncommon / BEHAVIOR: Fearful / AGE: 35 Years
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Mangrove Red Snapper
SIZE: 1,2m / RARITY: Uncommon / BEHAVIOR: Fearful / AGE: 35 Years

Sailfin Snapper
SIZE: 0,6m / RARITY: Rare / BEHAVIOR: Indifferent
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Bluestripe Snapper
SIZE: 0,4m / RARITY: Common / BEHAVIOR: Indifferent
Sweetlips
Plectorhinchus chaetodonoides, the harlequin sweetlips, is a species of grunt native to the Indian Ocean and the western Pacific Ocean. It is a denizen of coral reefs found at depths of from 1 to 30 m.
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Harlequin Sweetlips
SIZE: 0,7m / RARITY: Uncommon / BEHAVIOR: Indifferent
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Oriental Sweetlips
SIZE: 0,7m / RARITY: Common / BEHAVIOR: Indifferent

Yellowbanded Sweetlips
SIZE: 0,7m / RARITY: Common / BEHAVIOR: Indifferent
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Dory Snapper
SIZE: 0,35m / RARITY: Common / BEHAVIOR: Indifferent AGE: 23 years
Emperors
The Lethrinidae are a family of fishes in the order Perciformes commonly known as emperors, emperor breams, and pigface breams. These fish are found in tropical waters of the Pacific and Indian Oceans, and Lethrinus atlanticus is also found in the eastern Atlantic Ocean.
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Longface Emporor
SIZE: 1,00m / RARITY: Uncommon / BEHAVIOR: Fearful

Sweetlip Emporor
SIZE: 0,90m / RARITY: Uncommon / BEHAVIOR: Fearful

Thumbprint Emporor
SIZE: 0,50m / RARITY: Uncommon / BEHAVIOR: Fearful AGE: 15 Years

Striped large-eye bream
SIZE: 0,30m / RARITY: Common / BEHAVIOR: Indifferent
Soapfishes and Dottybacks
The Serranidae (Soapfishes and Dottybacks) are a large family of fishes belonging to the order Perciformes. The family contains about 450 species in 65 genera, including the sea basses and the groupers (subfamily Epinephelinae).
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Firetail Dottyback
SIZE: 0,20m / RARITY: Uncommon / BEHAVIOR: Fearful
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Royal Dottyback
SIZE: 0,07m / RARITY: Common / BEHAVIOR: Indifferent
Groupers
The Serranidae are a large family of fishes belonging to the order Perciformes. The family contains about 450 species in 65 genera, including the sea basses and the groupers (subfamily Epinephelinae). Although many species are small, in some cases less than 10 cm, the giant grouper (Epinephelus lanceolatus) is one of the largest bony fishes in the world, growing to 2.7 m in length and 400 kg in weight. Representatives of this group live in tropical and subtropical seas worldwide.

Brown-marbled Grouper
SIZE: 1,20m / RARITY: Rare / BEHAVIOR: Indifferent

Malabar Grouper
SIZE: 1,20m / RARITY: Uncommon / BEHAVIOR: Fearful / AGE: 32 Years

Highfin Coralgrouper
SIZE: 0,75m / RARITY: Rare / BEHAVIOR: Indifferent

Humpback Grouper
SIZE: 0,70m / RARITY: Rare / BEHAVIOR: Fearful
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Peacock hind
SIZE: 0,75m / RARITY: Rare / BEHAVIOR: Fearful

Tomato hind
SIZE: 0,58m / RARITY: Uncommon / BEHAVIOR: Indifferent
Angelfish
Marine angelfish are perciform fish of the family Pomacanthidae. They are found on shallow reefs in the tropical Atlantic, Indian, and mostly western Pacific Oceans. The family contains seven genera and about 86 species. They should not be confused with the freshwater angelfish, tropical cichlids of the Amazon Basin.

Bluering Angelfish
SIZE: 0,45m / RARITY: Rare / BEHAVIOR: Indifferent
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Sixbar Angelfish
SIZE: 0,45m / RARITY: Uncommon / BEHAVIOR: Fearful

Yellowface Angelfish
SIZE: 0,38m / RARITY: Rare / BEHAVIOR: Fearful
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Royal Angelfish
SIZE: 0,25m / RARITY: Uncommon / BEHAVIOR: Indifferent / AGE: 15 Years
Butterflyfishes
The butterflyfish are a group of conspicuous tropical marine fish of the family Chaetodontidae; the bannerfish and coralfish are also included in this group. The approximately 129 species in 12 genera[1] are found mostly on the reefs of the Atlantic, Indian, and Pacific Oceans. A number of species pairs occur in the Indian and Pacific Oceans, members of the huge genus Chaetodon.
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Pennant Coralfish
SIZE: 0,25m / RARITY: Common / BEHAVIOR: Indifferent
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Lined Butterflyfish
SIZE: 0,30m / RARITY: Rare / BEHAVIOR: Fearful / AGE: 10 Years

Chopperband Butterflyfish
SIZE: 0,38m / RARITY: Rare / BEHAVIOR: Fearful

Redtail Butterflyfish
SIZE: 0,18m / RARITY: Uncommon / BEHAVIOR: Indifferent
Parrotfishes
Parrotfishes are a group of about 95 fish species regarded as a family (Scaridae), or a subfamily (Scarinae) of the wrasses. With about 95 species, this group’s largest species richness is in the Indo-Pacific. They are found in coral reefs, rocky coasts, and seagrass beds, and can play a significant role in bioerosion.

Steephead Parrotfish
SIZE: 0,70m / RARITY: Uncommon / BEHAVIOR: Indifferent

Daisy Parrotfish
SIZE: 0,40m / RARITY: Common / BEHAVIOR: Indifferent
Triggerfishes
Triggerfishes are about 40 species of often brightly colored fish of the family Balistidae. Often marked by lines and spots, they inhabit tropical and subtropical oceans throughout the world, with the greatest species richness in the Indo-Pacific. Most are found in relatively shallow, coastal habitats, especially at coral reefs, but a few, such as the oceanic triggerfish (Canthidermis maculata), are pelagic. While several species from this family are popular in the marine aquarium trade, they are often notoriously ill-tempered.

Titan Triggerfish
SIZE: 0,85m / RARITY: Common / BEHAVIOR: Agressive

Picasso Triggerfish
SIZE: 0,30m / RARITY: Uncommon / BEHAVIOR: Agressive
Filefishes
The filefish (Monacanthidae) are a diverse family of tropical to subtropical tetraodontiform marine fish, which are also known as foolfish, leatherjackets or shingles. They live in the Atlantic, Pacific and Indian Oceans. Filefish are closely related to the triggerfish, pufferfish and trunkfish.

Scrawled Filefish
SIZE: 1,10m / RARITY: Uncommon / BEHAVIOR: Fearful

Prickly Leatherjacket
SIZE: 0,31m / RARITY: Rare / BEHAVIOR: Indifferent
Pufferfishes
The Tetraodontidae are a family of primarily marine and estuarine fish of the order Tetraodontiformes. The family includes many familiar species which are variously called pufferfish, puffers, balloonfish, blowfish, blowies, bubblefish, globefish, swellfish, toadfish, toadies, honey toads, sugar toads, and sea squab.

Black-blothed Porcupinefish
SIZE: 0,65m / RARITY: Uncommon / BEHAVIOR: Indifferent

Blackspotted Pufferfish
SIZE: 0,33m / RARITY: Common / BEHAVIOR: Indifferent
Goatfishes and other bottom Fishes
Goatfishes are characterized by a pair of chin barbels (or “goatee”), which contain chemosensory organs and are used to probe the sand or holes in the reef for food. Their bodies are deep and elongated, with forked tails and widely separated dorsal fins.

Dash-and-Dot Goatfish
SIZE: 0,60m / RARITY: Common / BEHAVIOR: Indifferent

Doublebar Goatfish
SIZE: 0,35m / RARITY: Common / BEHAVIOR: Indifferent

Striped eel Catfish
SIZE: 0,32m / RARITY: Uncommon / BEHAVIOR: Indifferent / Dangerousness: Lethal

Mandarinfish
SIZE: 0,07m / RARITY: Common / BEHAVIOR: Indifferent
Lengthened & Strange Fishes
The pipefish is widespread throughout the tropical waters of the Indo-Pacific region, Red Sea included. Its range includes Australia, Fiji, French Polynesia, Indonesia, Japan, the Marshall Islands, New Caledonia, Northern Mariana Islands, Papua New Guinea, the Philippines, Samoa, the Solomon Islands, South Africa, and Taiwan. It inhabits tide pools, lagoons, and outer reef slopes in tropical climates.
Seahorses range in size from 1.5 to 35.5 cm. They are named for their equine appearance, with bent necks and long snouted heads and a distinctive trunk and tail. Although they are bony fish, they do not have scales, but rather thin skin stretched over a series of bony plates, which are arranged in rings throughout their bodies.

Ringed Pipefish
SIZE: 0,19m / RARITY: Rare / BEHAVIOR: Indifferent AGE: 10 Years

Grooved Razor-fish
SIZE: 0,15m / RARITY: Uncommon / BEHAVIOR: Indifferent

Spotted Seahorse
SIZE: 0,30m / RARITY: Rare / BEHAVIOR: Indifferent

Brown-banded Pipefish
SIZE: 0,10m / RARITY: Rare / BEHAVIOR: Indifferent
Blennies and Gobies
Generally benthic fish, blennies spend much of their time on or near the bottom. They may inhabit the rocky crevices of reefs, burrows in sandy or muddy substrates, or even empty shells. Generally found in shallow waters, some combtooth blennies are capable of leaving the water for short periods during low tide, aided by their large pectoral fins which act as “feet”. Small benthic crustaceans, mollusks, and other sessile invertebrates are the primary food items for most species; others eat algae or plankton.

Maiden Goby
SIZE: 0,20m / RARITY: Common / BEHAVIOR: Indifferent

GLeopard blenny
SIZE: 0,15m / RARITY: Uncommon / BEHAVIOR: Fearful

Blackflap Blenny
SIZE: 0,30m / RARITY: Rare / BEHAVIOR: Indifferent

Linear Blenny
SIZE: 0,09m / RARITY: Uncommon / BEHAVIOR: Indifferent
Lizardfishes
Lizardfishes are generally small, although the largest species measures about 60 cm in length. They have slender, somewhat cylindrical bodies, and heads that superficially resemble those of lizards. The dorsal fin is located in the middle of the back, and accompanied by a small adipose fin placed closer to the tail. They have mouths full of sharp teeth, even on the tongue.

Variegated Lizardfish
SIZE: 0,40m / RARITY: Common / BEHAVIOR: Indifferent

Speckled Sandperch
SIZE: 0,30m / RARITY: Common / BEHAVIOR: Indifferent

Spotted Sand-diver
SIZE: 0,22m / RARITY: Uncommon / BEHAVIOR: Fearful

Fire goby
SIZE: 0,09m / RARITY: Common / BEHAVIOR: Fearful
Scorpionfishes
The Scorpionfishes (Scorpaeniformes) are a diverse order of ray-finned fish, including the lionfish, but have also been called the Scleroparei. It is one of the five largest orders of bony fishes by number of species, with over 1,320. They are known as “mail-cheeked” fishes due to their distinguishing characteristic, the suborbital stay: a backwards extension of the third circumorbital bone (part of the lateral head/cheek skeleton, below the eye socket) across the cheek to the preoperculum, to which it is connected in most species

Scorpaena Scrofa (Dragon-head)
SIZE: 0,30m / RARITY: Common / BEHAVIOR: Indifferent / Dangerousness: Spines/Lethal

Broadbarred Firefish
SIZE: 0,20m / RARITY: Uncommon / BEHAVIOR: Indifferent / Dangerousness: Spines/Lethal

Red Lionfish
SIZE: 0,40m / RARITY: Common / BEHAVIOR: Indifferent / Dangerousness: Spines/Lethal
Reptiles
Reptiles are tetrapod animals in the class Reptilia, comprising today’s turtles, crocodilians, snakes, amphisbaenians, lizards, tuatara, and their extinct relatives. The study of these traditional reptile orders, historically combined with that of modern amphibians, is called herpetology.

Leatherback Turtle
SIZE: 2,00m / RARITY: Rare / BEHAVIOR: Indifferent

Green Turtles
SIZE: 1,20m / RARITY: Uncommon / BEHAVIOR: Indifferent

Hawksbill Turtle
SIZE: 1,00m / RARITY: Uncommon / BEHAVIOR: Fearful

Blue-lipped Sea Krait
SIZE: 1,10m / RARITY: Rare / BEHAVIOR: Indifferent / Dangerousness: Lethal
Shrimps
Shrimps play important roles in the food chain and are an important food source for larger animals ranging from fish to whales. The muscular tails of many shrimp are edible to humans, and they are widely caught and farmed for human consumption. Commercial shrimp species support an industry worth 50 billion dollars a year, and in 2010 the total commercial production of shrimp was nearly 7 million tonnes.

Harlequin Shrimp
SIZE: 0,05m / RARITY: Rare / BEHAVIOR: Fearful

Dancing shrimp
SIZE: 0,05m / RARITY: Uncommon / BEHAVIOR: Indifferent

Pine-cone-marbled shrimp
SIZE: 0,04m / RARITY: Rare / BEHAVIOR: Indifferent

Peacock-tail anemone shrimp
SIZE: 0,04m / RARITY: Common / BEHAVIOR: Indifferent
Crabs
Crabs are generally covered with a thick exoskeleton, composed primarily of highly mineralized chitin, and armed with a single pair of chelae (claws). Crabs are found in all of the world’s oceans, while many crabs live in fresh water and on land, particularly in tropical regions. Crabs vary in size from the pea crab, a few millimeters wide, to the Japanese spider crab, with a leg span up to 4 m.

Spotted-Reef Crab
SIZE: 0,17m / RARITY: Uncommon / BEHAVIOR: Indifferent

Splendid-Pebble Crab
SIZE: 0,15m / RARITY: Uncommon / BEHAVIOR: Indifferent

Spanner Crab
SIZE: 0,15m / RARITY: Common / BEHAVIOR: Fearful

Hairy-Yellow Hermit Crab
SIZE: 0,12m / RARITY: Common / BEHAVIOR: Fearful
Bivalves
Bivalvia, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. Bivalves as a group have no head and they lack some usual molluscan organs like the radula and the odontophore. They include the clams, oysters, cockles, mussels, scallops, and numerous other families that live in saltwater, as well as a number of families that live in freshwater.

Giant Clam
RARITY: Rare / Assosiation: Symbiosis / AGE: 100 years

Black-lip-Pearl Oyster
RARITY: Common

Coral Scallop
RARITY: Common

Oriental-Fire Clam
RARITY: Rare
Gastropods
The gastropods, commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda. This class comprises snails and slugs from saltwater, from freshwater, and from the land. There are many thousands of species of sea snails and slugs, as well as freshwater snails, freshwater limpets, and land snails and slugs.

Giant Clam
SIZE: 0,40M / RARITY: Uncommon

Rose-branch-Murex
SIZE: 0,13M / RARITY: Common

Textile-Crone Shell
SIZE: 0,15M / RARITY: Rare / DANGEROUSNESS: Spine/Lethal

Map Crowie
SIZE: 0,10M / RARITY: Rare
Nudibranchs
Nudibranchs are a group of soft-bodied, marine gastropod molluscs which shed their shells after their larval stage. They are noted for their often extraordinary colours and striking forms, and they have been given colourful nicknames to match, such as “clown,” “marigold,” “splendid,” “dancer,” “dragon,” or “sea rabbit.” Currently, about 3,000 valid species of nudibranchs are known.

Red-lined Jorunna
SIZE: 0,30M / RARITY: Rare

Black and Green Sea-Slug
SIZE: 0,12M / RARITY: Unommon

Varicose Wart-Slug
SIZE: 0,11M / RARITY: Rare

Annas Chromodoris
SIZE: 0,05M / RARITY: Uncommon
Cephalopods
Most sea cucumbers, as their name suggests, have a soft and cylindrical body, more or less lengthened, rounded off and occasionally fat in the extremities, and generally without solid appendages. Their shape ranges from almost spherical for “sea apples” (genus Pseudocolochirus) to serpent-like for Apodida or the classic sausage-shape, while others resemble caterpillars.

Mimic Octopus
SIZE: 0,60M / RARITY: Rare

Broadclub Cuttlefish
SIZE: 0,50M / RARITY: Unommon

Bigfin-Reef Squid
SIZE: 0,45M / RARITY: Common
Sea Cucambers
A cephalopod is any member of the molluscan class Cephalopoda (Greek plural κεφαλόποδες, kephalópodes; “head-feet”) such as a squid, octopus, or nautilus. These exclusively marine animals are characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles (muscular hydrostats) modified from the primitive molluscan foot. Fishermen sometimes call cephalopods “inkfish,” referring to their common ability to squirt ink.

Curryfish Sea-Cucumber
SIZE: 0,60M / RARITY: Uncommon

Black-Spotted Sea-Cucumber
SIZE: 0,70M / RARITY: Unommon
Urchins
Sea urchins, are typically spiny, globular animals, echinoderms in the class Echinoidea. About 950 species live on the seabed, inhabiting all oceans and depth zones from the intertidal to 5,000 metres. Their tests (hard shells) are round and spiny, typically from 3 to 10 cm across. Sea urchins move slowly, crawling with their tube feet, and sometimes pushing themselves with their spines. They feed primarily on algae but also eat slow-moving or sessile animals.

Diadem Urchin
SIZE: 0,60m / RARITY: Common / DANGEROUSNESS: Spine

Flower Urchin
SIZE: 0,15m / RARITY: Common / DANGEROUSNESS: Spine/Lethal
Sea Stars
Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea. Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or basket stars. Starfish are also known as Asteroids due to being in the class Asteroidea. About 1,500 species of starfish occur on the seabed in all the world’s oceans, from the tropics to frigid polar waters.

Crown-of-Thornes Starfish
SIZE: 0,50m / RARITY: Uncommon / Dangerousness: Spine

Cushion Starfish
SIZE: 0,30m / RARITY: Uncommon
Worms
Pseudoceros ferrugineus can reach a length of about 18–48 mm. It has an enlarged oval shape. The upper surface of the body is fuchsia (hence the common name) with small white dots and two marginal bands red and orange without dots

Hymans flatworm
SIZE: 0,07m / RARITY: Uncommon

Brilliant flatworm
SIZE: 0,06m / RARITY: Uncommon

Lindas flatworm
SIZE: 0,06m / RARITY: Uncommon

Fuchsa flatworm
SIZE: 0,06m / RARITY: Uncommon

Flowers flatworm
SIZE: 0,04m / RARITY: Uncommon
Worms-2
Sabellidae, or feather duster worms, are a family of marine polychaete tube worms characterized by protruding feathery branchiae. Sabellids build tubes out of a tough, parchment-like exudate, strengthened with sand and bits of shell. Unlike the other sabellids, the genus Glomerula secretes a tube of calcium carbonate instead. Sabellidae can be found in subtidal habitats around the world. Their oldest fossils are known from the Early Jurassic.

Feather-Duster Worm
SIZE: 0,04m / RARITY: Common

Red Fanworm
SIZE: 0,06m / RARITY: Common

Christmas-tree Worms
SIZE: 0,04m / RARITY: Common
Branching Corals
Stony corals are members of the class Anthozoa and like other members of the group, do not have a medusa stage in their life cycle. The individual animals are known as polyps and have a cylindrical body crowned by an oral disc surrounded by a ring of tentacles. The base of the polyp secretes the stony material from which the coral skeleton is formed.

Great Staghorn Coral
SIZE: 7,00m / RARITY: Common

Staghorn Coral
SIZE: 1,50m / RARITY: Common / VULNERABILITY: Threatened

Robust Table-coral
SIZE: 1,20m / RARITY: Common
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Wide Star Acropora
SIZE: 0,80m / RARITY: Common

Finger Acropora
SIZE: 0,60m / RARITY: Common

Sandpaper Coral
SIZE: 2,50m / RARITY: Common

Antler Coral
SIZE: 1,00m / RARITY: Common / VULNERABILITY: Threatened

Juweled Finger Coral
SIZE: 1,00m / RARITY: Common / VULNERABILITY: Threatened

Finger Coral
SIZE: 0,50m / RARITY: Common

Finger Coral
SIZE: 0,30m / RARITY: Common
Massive- & Brain Corals

Knob Coral
SIZE: 1,00m / RARITY: Common

Honeycomb Coral
SIZE: 1,50m / RARITY: Common / VULNERABILITY: Threatened

Head Coral
SIZE: 1,00m / RARITY: Common

Flexus Moon Coral
SIZE: 1,20m / RARITY: Common / VULNERABILITY: Threatened

Columna Gonioppra
SIZE: 0,60m / RARITY: Common / VULNERABILITY: Threatened

Lobed Brain Coral
SIZE: 5,00m / RARITY: Common

Bubble Coral
SIZE: 2,00m / RARITY: Uncommon / VULNERABILITY: Threatened

Net Brain Coral
SIZE: 1,00m / RARITY: Common

Australian Brain Coral
SIZE: 2,00m / RARITY: Common

Closed Brain Coral
SIZE: 1,50m / RARITY: Common / VULNERABILITY: Threatened
Leaf-, Mushroom & Hydros-, Flower Corals

Rough pachyseris
SIZE: 8,00m / RARITY: Common

Leafy Cub Coral
SIZE: 3,00m / RARITY: Plenty / VULNERABILITY: Threatened

Elepant-skin Coral
SIZE: 2,00m / RARITY: Common

Mushroom Coral
SIZE: 0,30m / RARITY: Common

Open brain Coral
SIZE: 0,20m / RARITY: Uncommon / VULNERABILITY: Threatened

Fire Coral
SIZE: 1,00m / RARITY: Common

Anchor Coral
SIZE: 1,00m / RARITY: Uncommon / VULNERABILITY: Threatened

Orange Cup Coral
SIZE: 0,35m / RARITY: Uncommon

Yellow Commensal Anemon
SIZE: 0,30m / RARITY: Uncommon

Mushroom Anemone
SIZE: m / RARITY: Common
Sea Fans & Anemones

Lyre Sea Fan
SIZE: 1,50m / RARITY: Unommon

Giant Sea Fan
SIZE: 2,00m / RARITY: Uncommon

Knotted Fan Coral
SIZE: 1,00m / RARITY: Uncommon

Black Coral
SIZE: 3,00m / RARITY: Rare

Spiral Wire Coral
SIZE: 2,00m / RARITY: Common

Magnificient Sea Anemone
SIZE: 1,00m / RARITY: Common

Giant Carpet Anemone
SIZE: 1,20m / RARITY: Common

Bulb-tentacle sea anemone
SIZE: 0,40m / RARITY: Common

Pizza Sea Anemone
SIZE: 0,35m / RARITY: Uncommon

Stout Hells-fire Anemone
SIZE: 0,50m / RARITY: Rare
Soft Corals & Jellyfish

Organ Pipe Coral
SIZE: 1,00m / RARITY: Uncommon

Leather Coral
SIZE: 0,80m / RARITY: Plenty

Carnation Tree Coral
SIZE: 0,70m / RARITY: Plenty

Flexible Leather Coral
SIZE: 0,50m / RARITY: Plenty

Pulsing Coral
SIZE: 0,20m / RARITY: Uncommon

Spotted Jelly
SIZE: 3,00m / RARITY: Rare / DANGEROUSNESS: Urticant

Australian Spotted Jellyfish
SIZE: 0,70m / RARITY: Uncommon / DANGEROUSNESS: Urticant

Portoguese Man-of-War
SIZE: 0,20m / RARITY: Rare / DANGEROUSNESS: Urticant/Lethal

Upside-down Jellyfish
SIZE: 0,30m / RARITY: Uncommon / DANGEROUSNESS: Urticant

Australian Box-jellyfish
SIZE: 4,00m / RARITY: Rare / DANGEROUSNESS: Urticant/Lethal
Tube-, Vase-, Branching- & Massive Sponges

Liliac Tube-sponge
SIZE: 0,80m / RARITY: Unommon

Barrel Sponge
SIZE: 2,00m / RARITY: Plenty

Large Tube-sponge
SIZE: 0,80m / RARITY: Uncommon

SIZE: 0,50m / RARITY: Uncommon

Elephant ear sponge
SIZE: 2,00m / RARITY: Common

Pink Puff Ball Sponge
SIZE: 0,10m / RARITY: Rare

Red Finger Sponge
SIZE: 0,70m / RARITY: Common

Vagabound Boring Sponge
SIZE: 1,00m / RARITY: Common

Red Boring Sponge
SIZE: 1,00m / RARITY: Uncommon

Yellow Pot Sponge
SIZE: 0,30m / RARITY: Common
Knowledge Quest PDF
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For all your fun dives or dive courses from beginner to professional divers!
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Diving trips
We take you to the best dive sites around Koh Chang, Thailand!
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SCUBA Diving Koh Chang
SCUBA Diving in Koh Chang is a great way to spend your holidays with. Explore the beautiful marine life, is worth it. We are diving all year round
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How is the Weather
Check out the Koh Chang Weather
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Koh Chang Dive-Sites
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