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BiologyInhabits ledges and caves and crevices of steep outer reef slopes; occasionally found in clear lagoon reefs. It is secretive and rarely goes out more than a few centimeters from an escape hole (Ref. 9710). Forms pairs or small groups. Occasionally exported through the aquarium trade. Usually starves when kept in captivity (Ref. 48391). Often upside-down (Ref. 48636).