TUBE BLENNIES - Chaenopsidae
Body compressed; usually elongated to anguilliform in Chaenopsis. Scaleless. Lateral line absent, or not more than 3 pores behind operculum.  Caudal fin separate or joined to dorsal and anal fins in varying degrees. Nape without cirri. With or without orbital and nasal cirri. Head rough, often with spines. About 16 cm maximum length; most much smaller. Symbiosis between a chaenopsid and a stony coral has been reported from the Caribbean. Most dwell in abandoned invertebrate tubes and feed on small crustaceans. Assumed to guard eggs in their tubes
Acanthemblemaria spinosa
Greek, chaino = with the mouth open + Greek, ops = similar to