Species: Elacatinus atronasus, Blacknose Goby

Elacatinus atronasus (Bohlke & Robins, 1968)

Blacknose Goby

Elongate; head compressed; mouth U-shaped, slightly under snout, top lip separate from snout; top jaw ends under rear border of eye; tongue short, tip truncate or slightly emarginated; males with outer row of long teeth above, two fangs at rear; lower jaw with two large fangs in inner row; gill membranes broadly joined to body under throat, with 5 rays; dorsal fin VII + I, 11 (10-11); length of 2nd dorsal base > distance from 2nd dorsal base to tail fin; anal fin I, 10 (9-11); pectoral fins 16 (15-17); pelvic fins I, 5, disk complete; tail rounded; no scales; no lateral line.

Snout and front of head black, with a long oval yellow spot from just before eye to near mouth; a yellow stripe from top of eye to the base of tail fin, often with a break in that stripe just before the tail fin; a lateral dark stripe, well developed and wide, from the bottom of the pectoral-fin base to lower portion of tail fin, where it forms a distinct oval black spot; top of body dusky; all fins, except tail fin, clear.

Reaches: 5.0 cm.

Habitat: vertical faces of coral ledges, with numerous holes and around undercut ledges.

Depth: 25-35 m.

The Bahamas and Cuba.