Species: Microgobius brevispinis, Balboa goby, Short-spine goby

Both sexes:  grey brown, base of tail (behind anus) paler than body; three oblique blue bars separated by orange on operculum; two blue spots separated by orange on pectoral base; pelvics blackish, with white margin. Male:  a dark blotch with a blue bar behind it under anterior dorsal spines; back behind anus with a blue stripe above, and (sometimes) 2 orange spots below; first dorsal with a black spot on first spine, red outer margin; second dorsal dusky, with red spots at lower rear and a yellow oblique central stripe; tail fin with red spots above, a red central stripe and yellow below; anal fin dusky. Female:  intense orange bar bounded in front by blue bar and two orange spots on body under the first dorsal fin; a short blue bar on midside just behind anus.