Common names: goby (English), gobio (Espanol)
Evermannia zosterura (Jordan & Gilbert, 1882)
Bandedtail goby, Banded goby
Body slender, elongate; head long, depressed; 1 pore between eyes; papillae on cheek and gill cover; top jaw extends well past eye; dorsal fin IV (1st spine elongate in male) + I, 14-15 rays; anal I, 13-15 rays; 1 long flexible skin flap on shoulder in front of base of pectoral fin; tail fin long, rounded; scales - smooth, few, minute, imbedded, non-overlapping, on tail fin base.
Male olive, mottled with black above and yellow-brown below; head and body densely speckled with tiny black dots; second dorsal and anal with yellowish base, broad black band, broad white margin, tail with center yellow, black bands above and below, and white upper and lower margins, pectorals and pelvics dusky; Female as in male, but dorsals and anal checkered with black, tail faintly barred, all vertical fins with pale margins.
Size: 5 cm.
Habitat: rocky tide pools.
Depth: 0-5 m.
Southern Gulf of California to northern Peru.