Body long, slender, compressed; snout steep, mouth small; eyes near top of head; tentacles absent from nostrils and above eye; dorsal fin long-based; pelvic fins reduced to a hidden spine and two long, slender rays. Males with a prominent fleshy crest on the head, and long filamentous dorsal-fin rays. Usually olive green with black spots and fine bluish or blackish lines along sides, and fine whitish wavy lines on head. To 9 cm.
This species is common along the east coast. Often found amongst encrusting tube worms in the intertidal region of Port Phillip Bay. Females lay eggs in empty oyster or mussel shells.
Shallow tropical and temperate bays and estuaries, especially amongst oyster and mussel beds, in depths of 0-10 m.
New Zealand, eastern and south-eastern Australia.
Recorded in Australia
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Least Concern