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BiologyInhabit shallow sheltered reefs (Ref. 9710). Adults usually with sponges; juveniles openly on sand or reef, mimicking small sponges or nudibranchs (Ref. 48635). Benthic (Ref. 58302). Oviparous. Eggs are bound in ribbon-like sheath or mass of gelatinous mucus called 'egg raft' or 'veil' (Ref. 6773).