Small, slender goby with an pointed, bulbous snout. Maximum length about 2.4 in (6 cm). Has two dorsal fins and a square-
shaped caudal fin about the same height as the body. The pelvic fins are joined to form a cuplike sucking disk. Dorsally the fish is dark, with an iridescent pale blue stripe running laterally along the lower edge of the dorsum, extending from the snout to the caudal fin. This lateral streak in fishes from Belize is blue in the middle bordered by white. The underside of the head and the abdomen are pale.
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