Speartail Mudgoby

Characterized by pale brownish grey body color with three longitudinal rows of dark brown spots on body;, upper row as double spots and middle row as large rectangular blotches; pectoral fin base covered by a large oval blackish spot; irregular dark brown bar below eye; dorsal fins joined basally by membrane; united pelvic fins, well-developed frenum present; long and pointed caudal fin, 2.4-2.7 in SL; longitudinal scale series 100; ctenoid scales posteriorly, becoming cycloid anteriorly; head, nape, prepectoral area and breast without scales; low fleshy crest from above upper end of preopercular margin to origin of first dorsal fin; depth of body 5.3-5.7 in SL (Ref. 90102).

Benthic spawner.

Dorsal spines (total): 6 - 7; Dorsal soft rays (total): 12 - 13; Analspines: 1; Analsoft rays: 12 - 14

Benthic on mud in shallow brackish waters (Ref. 58302). Also found in sand bottoms in estuaries and stream mouths in 1-4 m (Ref. 90102).

Oxyurichthys lonchotus, commonly known as the speartail mudgoby, is a species of goby found in Hawaii and Indonesia. This species reaches a length of 4.7 cm (1.9 in).