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BiologyFound in rich coastal to outer reefs, usually along deep walls with caves, rich with invertebrate growth such as large sponges or soft corals (Ref. 48635). A secretive species. Active nocturnally in shallow water and diurnally in deeper water (Ref. 5222). Often seen with the cleaner shrimp Periclimenes elegans (Ref. 37816). Feeds mainly on fishes (Ref. 5222).