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BiologyInhabits sandy areas of clear lagoon and seaward reefs (Ref. 9710, 48637). Occurs in pairs and use burrows as refuge. Monogamous (Ref. 52884). The burrow is shallow, only a few cm, and made under large pieces of rubble. May be found on dark volcanic sand such as those in the Philippines, Indonesia, and the northern Mariana Is. Also Ref. 58652.