Elacatinus serranilla

Common Name

Seranilla Goby

Year Described

Randall & Lobel, 2009


Dorsal Fin: VII, I, 10
Anal Fin: I, 10
Pectoral Fin: 17-18 (usually 18)
Caudal Fin: 13 branched, 9 upper and lower procurrent
Gill Rakers: 2, 9
Vertebrae: 28

Mouth subterminal. Pelvic fins fully united into circular disk. Body scaleless.


Body stripe bright silvery white, bordered by broad black stripes on both sides. Stripes taper off on caudal fin. No yellowish pigment anywhere on head. Snout with a short silvery-white stripe. Back dark gray. Belly gray to whitish. A thin bluish stripe on cheek under black stripe. Fins transparent.


Maximum size to 34.6mm SL.


Coral reefs from 15-24m. Closely associated with sponges. Not known to clean other fishes.


Known from Serranilla Bank and off Jamaica.


Randall, J. E. & P. S. Lobel. 2009. A literature review of the sponge-dwelling gobiid fishes of the genus Elacatinus from the western Atlantic, with description of two new Caribbean species. Zootaxa No. 2133: 1-19.

Other Notes

This species is related to Elacatinus xanthiprora, but that species has a yellow stripe and 11-12 dorsal finrays.