IDENTIFICATION

Head Pores - Head canal system with pores B',C,D,F,H'; preopercle with pores M',N'

Scales - No scales present

Fins - D1 - VII, First spine prolonged in both sexes,longer in males, reaching the base of the first dorsal ray; D2 - 11(10-11); pectoral - 18(17-19); anal - 10(9-10)

Head - Maxilla reaching to middle of eye; anterior nostril a tube; posterior nostril a raised rim;

Papillae - A transverse pattern with three rows anterior to row b; row 5i/6i at the anterior of row b and attached to it; no vertical rows extend below the level of row d

Color - Bussing 1990: Body of alcohol preserved specimens with ten dark crossbars dorsally that are wider than pale interspaces, counded from base of pectoral fin to base of caudal fin. Several bars on vertical half of body bifurcated or disjoined into half-bars; ventral bars straw-colored and narrower than similar straw-colored interspaces, these bars have dark margins and a few irregularly dispersed melanophores. Five internal pigment blotches on lower sides; each diffuse blotch corresponding to a pair of dorsal bars; most evident in smaller specimens by transmitted light. Holotype with 14 vertical bars on left side, 12 bars on right side; 10 paratypes with 10-14 ventral bars.
Head coloration is as in E.(Tigrigobius) inornatus and most easily described in a manner inconsistant with the description of body coloration. That is, pale narrow bars alternating with wide interspaces typically darker or rarely of equal intensity as bars. Three narrow cross-bars on head of nearly same intensity as wide interspaces on holotype and some paratypes; paler than interspaces on other specimens. Cross bars with dark margins. First bar crossing over head, and fading on lower opercle and anterior base of pectoral fin. Third bar between eye and rictus of mouth. Snout dusky.
First dorsal fin unpigmented proximally, followed by a brown or black longitudinal streak formed by dark blotches on interradial mambranes; blotches between fourth and fifth and sixth spines most prominent; distal four-fifths of fin dusky with a darker margin. Second dorsal fin usually with a narrow proximal unpigmented area; oblique black streaks on interradial membranes most intense proximally, fading to dusky distally, fin margin darker. Anal fin solid brown, slightly more intense distally on some specimens. Caudal fin dusky. Paired fins with a few scattered melanophores.

Distribution - Known only from Isla del Coco and Isla Galapagos

Habitat -

Notes -