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Filefish
At one time, Filefish were considered part of the Triggerfish family. It is true that both families have similarities, such as an erectable latch and compressed body, but Filefish do vary in some ways from Triggerfish. The first ventral spine is quite long, much longer than the second spiny dorsal. The fins are soft and simple, but the skin is very rough. In fact, this family of fish was named for their dried skin being used like sand paper for sanding jobs on boats. They are also referred to as leatherjackets for this same reason. The jaws have 6 outer teeth and 4 inner teeth. These teeth are smaller than those of Triggerfish, specially designed for nibbling on algae or sessile invertebrates. Filefish are not as popular in aquaria as are their close cousins, Triggerfish. Only a handful of specimens display the beautiful coloring that makes Triggerfish popular, but most species are easy to keep in captivity. In general, Filefish will grow to accept a variety of aquarium foods. They will enjoy a diet of crustacean meat and hard shelled invertebrates. It is also a good idea to keep coraline-encrusted rock in the tank so that the fish can naturally file down its constantly growing teeth. Filefish should be fed several small meals a day, or at least be kept with live rock. However, most Filefish are not reef safe and will decimate corals and and consume decorative invertebrates. In addition, liverock will supply added hiding places that many species prefer when kept in captivity. Aquarists must be alert when working in a Filefish tank. These fish will give a very serious and painful nip to probing hands and fingers. Filefish may normally be kept with fish in the same family, but even then, some fin nipping may occur. It is best not to keep more than one of the same species together, unless aquarists can be assured of having a male and female pair. Other tank mate choices should be of similar disposition to be compatible with Filefish.
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