Occurs in streams with moderate flow in shallow areas of rocks and gravel (depth 0.4-0.6 m) just above tidal influence .
Dorsal spines (total): 7; Dorsal soft rays (total): 9; Anal spines: 1; Anal soft rays: 9. Schismatogobius tuimanua is distinguished by the following characters: pectoral fin with 13-14 rays; pectoral fins banded with 4-5 rows of blackish bars; membrane in first dorsal fin posterior to spine 6 is not connected at base of spine in second dorsal fin; ventral surface of head and isthmus blackish, paler on chest and branchiostegals in female; and pelvic disc banded with usually two or three rows of black spots .: elongated.
Behavioural data for Schismatogobius Tuimanua is currently being reviewed.
Diet information for Schismatogobius Tuimanua is currently being compiled.
Reproduction data for Schismatogobius Tuimanua is currently being compiled.
Freshwater; demersal; depth range 0 - 1 m . Subtropical endemic to Samoa and western Samoa.
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