Filefish can bring a smile to any hobbyist's face. They have several characteristics similar to triggerfish and puffers. One similarity they have to triggerfish is the retractable dorsal spine they use to lock themselves into a crevice. The filefish obtained its name from their scales which have a rough texture and small spikes. Filefish are opportunistic feeders, feeding on a mixture of invertebrates from shrimp to clams and algae. Many have a taste for corals making them a risky addition to a reef aquarium. With over 100 different species of filefish, ranging from 1"-43", there are several suitable to choose from for your home marine aquarium.