Sicyopterus Caudimaculatus (Sicyopterus caudimaculatus), first described by Maugé, Marquet & Laboute, 1992 is a small fish in the family Gobiidae (order Gobiiformes). Adults typically reach 9.90 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Tropical waters.
Characterised by a superior lip edge slightly nothched in between the three notches which are not very marked; a black line in between the middle of the eye and the grin; tiny scales on the anterior part of the body and the nape; 66 to 70 lateral scale rows; a black oval spot at the base of the caudal rays and at the tip of the caudal fin in male. Head rounded; snout profile clearly convex; maxilla reaching or almost reaching the anterior edge of the eye. Superior lip with a median notch and a lateral one on each side at the nostril level; edge of the lip very finely notched. Two close dorsal fins, the third spine of the first dorsal is elongated, especially in males; pelvic fins joint in one oval disc, free from the abdomen, at the back of the pelvic plate .: fusiform / normal.
Behavioural data for Sicyopterus Caudimaculatus is currently being reviewed.
Freshwater; demersal. Tropical endemic to the Marquesas Islands.
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