Fins - D1 - IV, none filamentous; D2 - 15(14-16); pectoral - 20(21-20); anal - 13(13-14)
Head - Maxilla extending more than pupil diameter beyond posterior of eye; interorbital very narrow 2.8-6.0 in orbital diameter.
Color - Background color translucent in life, whitish in alcohol.
Epidermal pigments consisting of pupil-sized white guanine blotches overlaid
by rather evenly scattered individual brown or black melanophores. Effective
pattern evenly speckled or specific melanophores expanded to create black
blotches along dorsal midline or crosshatching on upper half of body.
Belly white. Melanophores of lower half of head enlarged; on females a
few melanophores on tip of chin, on males covering entire throat and ismus.
Resultant color pattern of fish highly cryptic against sand substrate
Distribution - East Pacific; Costa Rica
Habitat - Found in burrows in the upper half of the littoral zone of sandy beaches.