Titan Triggerfish in Koh Chang – Behavior, Dangers & Best Dive Sites
The Titan Triggerfish (Balistoides viridescens) is one of the most fascinating yet misunderstood fish in tropical waters. While divers love its vibrant colors, it is also known for its strong territorial behavior. In Koh Chang, you can frequently encounter them at various dive sites.
1. Characteristics & Biology
- Scientific Name: Balistoides viridescens
- Size: Up to 75 cm
- Weight: Up to 10 kg
- Lifespan: 10-15 years
- Special Features: Powerful jaws with strong teeth for breaking corals and shells
2. Behavior & Lifestyle
The Titan Triggerfish is highly territorial, especially during nesting season. Divers should be aware of its conical defense zone: The fish defends its territory in an upside-down cone shape.
What to do if it gets aggressive?
- Swim calmly to the side, not upwards!
- Avoid sudden movements
- Respect its space
3. Diet & Feeding Habits
The Titan Triggerfish has a diverse diet, including:
- Coral
- Small fish
- Shellfish
- Mollusks & sea urchins
4. Best Dive Sites to See the Titan Triggerfish in Koh Chang
The Titan Triggerfish is found almost everywhere around Koh Chang, but the most popular reef for Titan Triggerfish is Hin Raab South.
| Dive Site | Special Features |
|---|---|
| Hin Raab South | Primary Titan Triggerfish area, especially at 5–15 m depth |
| HTMS Chang Wreck | Triggerfish commonly found in sandy areas around the wreck |
| Hin Luk Bat | Many Triggerfish hiding between large coral blocks |
5. Conclusion – Should You Be Afraid?
No! The Titan Triggerfish is an essential part of the ecosystem. With respect and awareness, divers can safely observe them.
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