young Titan triggerfish
In this video you can see a Titan Triggerfish in its juvenile phase during which, if possible, it tries to stay safe inside a lair that it has probably excavated. However, if it catches signs of danger, it runs away to find a safer refuge in the coral reef. The shape is characteristic of triggerfishes, but the light color is far from the adult stage. giovane balestra titano
The Titan triggerfish, Giant triggerfish or Moustache triggerfish (Balistoides viridescens) is a large species of triggerfish found in lagoons and at reefs to depths of 50 m. in most of the Indo-Pacific, though it is absent from Hawaii. With a length of up to 75 centimetres. it is the largest species of triggerfish in its range (the stone triggerfish, Pseudobalistes naufragium, from the east Pacific is larger).
The Titan triggerfish is diurnal and solitary. It feeds on sea urchins, molluscs, crustaceans, tube worms, and coral. It often feeds by turning over rocks, stirring up sand and biting off pieces of branching coral. This is why other smaller fish species are often seen around it, as they feed on the detritus and smaller organisms that are stirred up. Titan triggerfish have been observed being aggressive to other fish who enter their territory.
The Titan triggerfish is usually wary of divers and snorkelers, but during the reproduction season the female guards its nest, which is placed in a flat sandy area, vigorously against any intruders. The territory around the nest is roughly cone-shaped and divers who accidentally enter it may be attacked. Divers should swim horizontally away from the nest rather than upwards which would only take them further into the territory. Although bites are not venomous, the strong teeth can inflict serious injury that may require medical attention.
The threat posture includes the triggerfish facing the intruder while holding its first dorsal spine erect. It may also roll onto its side, allowing it a better look at the intruder it perceives as threatening its nest. The titan triggerfish will not always bite, but can swim at snorkellers and divers escorting them out of their territory. The flesh of the titan triggerfish is sometimes ciquatoxic.
(extract from Wikipedia)
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