Stenogobius alleni Watson 1991

Small and elegant, vertical trunk bars very faint in both sexes; first dorsal fin in males with short bars on membrane that do not appear as scribbles; second dorsal fin similarly marked; first dorsal fin in females with midlateral band and dusky margin, second dorsal with dusky spots forming two rows on membrane; predorsal midline with 2 to 18 scales, usually fully scaled, but may be with naked patches; belly anteriorly naked close to pelvic base; breast naked. Smallest species of the genus known.

Dorsal spines (total): 7; Dorsal soft rays (total): 11; Analspines: 1; Analsoft rays: 11

Inhabits freshwater streams.