One of my favorite fish because he is so cute and odd shaped. Sometimes swims sideways.
Their laterally compressed bodies and rough, sandpapery skin inspired the filefish's common name; it is said that dried filefish skin was once used to finish wooden boats.
Either solitary, in pairs or small groups depending on the species, filefish are not terribly good swimmers; their small fins confine the fish to a sluggish gait. Filefish are often observed drifting head downward amongst stands of seaweed, presumably in an effort to fool both predator and prey alike. When threatened, filefish may retreat into crevices in the reef.
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