Found most commonly on mixed coralline algae, but also on open sand and rock substrata, often with Gnatholepis thompsoni .
Dorsal spines (total): 7; Dorsal soft rays (total): 12 - 13; Anal spines: 1; Anal soft rays: 12. Anterior nostril with single triangular or more elongate tentacle, posterior nostril pore-like, with slightly raised edges; angle of jaws below anterior edge of pupil; upper lip with equal to or slightly narrower than preorbital width; teeth caniniform, in three or four rows medially with outer and inner somewhat enlarged . Body pale brown with several dark brown blotches interspersed with pale saddles along dorsal midline, variously sized dark blotches along lateral midline; fine horizontal striae sometimes evident along the body; snout with antrorse V-like dark mark .: fusiform / normal.
Behavioural data for Gobius Tetrophthalmus is currently being reviewed.
Marine; demersal; depth range 7 - 25 m . Tropical Central Atlantic: known only from Cape Verde.
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