File this Fish with the Shy Group

Filefish have a protruding mouth with some very sharp teeth, similar to a triggerfish. They have narrow, compressed bodies with rough spiny scales and a front dorsal fin that can be raised or lowered. When the fin is raised, it resembles a file, which some reference sources say is the inspiration for the name. Others attribute the moniker to the sandpaper-like quality of the scales. Whatever the true origin, filefish are another group of highly entertaining critters on the reef.

They eat a v...