They look menacing and are quite ugly, with long and strong teeth that jut out of their mouth, a big head, protruding eyes that can rotate independently and thick, tough scales. The body is so heavily armored that most spear-fishermen find it difficult to penetrate the Titan's thick body with their spear.
This infamous fish is notorious for its frequent attacks on divers and snorkelers. The bites while not venomous can inflict some serious injuries that may require medical attention. Others have claimed that the bites can cause an infection due to the ciguatoxin in their body. So if you've been bitten, it's best to go see a doctor for a jab. Usually, the Titan triggerfish will aim its attacks on a diver's fins with attacks on limbs and head less common. They don't always bite of course although sometimes unexplained attacks can occur but they will definitely attack during nesting season which is a few days after full moon. During this period they are extremely territorial and ferocious to any invaders.
When the Titan triggerfish attacks, it will charge at you continuously until you leave its territory. It is a good idea to keep your distance when you see a Titan triggerfish since they are generally short-sighted. Besides, their nest can be hard to spot so divers should keep their distance to avoid trespassing the Titan's territory. If you are under attack, don't panic. If you have a steel pointer, an underwater slate, camera or anything in hand, you can use it as a shield to defend yourself and to keep the Titan trigger at bay. Using your dive knife with the intention to injure the fish may not be the best idea, as you would need more luck than skill to wound it with your dive knife. Keep your eyes on it as you slowly and calmly swim away. Do not attempt to swim above it as you would still be in it's zone. Swim away horizontally as the zone they are protecting is an upward cone.