Triggerfish

In general, triggerfish have compressed ovoid bodies. In fact, many species look as though their bodies are half head with eyes in the middle of the back! The eyes are set far back on the head to prevent injury while eating sharp foods, such as crustaceans. Like all families in the order Tetraodontidae, triggerfish have small openings in the gill area. Their shape is distinct, and makes them easily identifiable as Balistoides.

Also unique, this family of fish has a total of three dorsal spines. Two spiny rays are found in the front dorsal fin. In its normal state, the trigger spine remains folded down in a grove, flush with the body. When erected, the second ray locks the first so that it can’t be folded down. The trigger lock is used when the fish are scared or escaping predation. Triggerfish may flee to crevices of rocks or corals. Once in place the spiny ray or “trigger” holds the fish in place, preventing its abduction. At night when resting, triggerfish may lock themselves into holes, caves, or corals with their strong trigger spine. When triggerfish are taken by surprise attack, the spine can still be a deterrent for predators who try to eat it. When the fish raises its trigger in a predators mouth, it is often spat out. Some species also have a rasp at the base of the tail used for counter-attack as well.

In captivity, they should be fed a varied diet of meaty foods, such as chopped shrimp, squid, clams, and fish. It is also a good idea to supplement their diet with frozen versions of marine algae and other vitamin enriched foods. Their aggressive eating requires them to be fed at least three times a day.

A few specimens naturally graze on algae. In aquaria, most Triggerfish will accept just about any food item. They are not finicky, as they easily live, frozen and dried foods. Some individuals can even be “trained” to hand accept hand feedings. However, ultimate caution is required. Triggerfish can easily injure fingers with their strong teeth. However, some species can be tamed to eat from fingers delicately.