Colon Goby

Analogues: The 10/10 sand goby clade share fin-ray counts, morphology, and most markings as larvae and new recruits. C. dicrus and the other head-striped sand gobies develop short stripes on top of the head very early in transition, separating them from the spotted-head gobies (i.e. C. eidolon, C. thrix, C. alloides, C. kuna, and the non-sand Coryphopterus species). Transitional C. dicrus diverge

Diagnosis: Modal fin-ray counts of D-VI,10 A-10 and Pect-18-20 with fused pelvic fins indicate the 10/10 Coryphopterus sand gobies, i.e. Coryphopterus dicrus, C. glaucofraenum, C. tortugae, C. bol, C. eidolon, and C. thrix. The distinguishing features of adult C. dicrus are mostly not present on recruits and small juveniles.

Pelvic frenum absent. Innermost pelvic-fin rays branched, connected to the ray of the opposite side by a basal membrane and smaller than immediately adjacent one (66 - 77% of its length). Elongate spine in the first dorsal fin absent. No spot above opercle (Ref. 52312).Two distinct dark spots, one above other, on pectoral fin base (Ref. 26938). With numerous small brown spots, the largest a series of 6 along lower side, and small pale blue-green flecks; horizontal dark lines on head, the most prominent posterior to eye; a vertical blackish line or two blackish spots at base of caudal fin (Ref. 13442).

Dorsal spines (total): 6; Dorsal soft rays (total): 9 - 10; Analspines: 1; Analsoft rays: 10; Vertebrae: 26

Inhabits coral reefs, tide pools, limestone caves, algae-covered rocks and isolated patch reefs surrounded by white sand (Ref. 5521). Omnivore (Ref. 57616).

Inhabits coral reefs, tide pools, limestone caves, algae-covered rocks and isolated patch reefs surrounded by white sand (Ref. 5521).

aquarium: commercial

Coryphopterus dicrus, the Colon goby, is a species of goby found in the Western Atlantic Ocean from southern Florida and the Bahamas all the way to Brazil.

This species reaches a length of 5.0 cm (2.0 in).