Common Name
Signal Goby
Year Described
Poey, 1876
Identification
Dorsal Fin: VII, 19-21 (usually 20)
Anal Fin: 20-22
Pectoral Fin: 19-22 (usually 20-21)
Gill Rakers: 5+16
Scales: 77-90 rows
Body elongate. Mouth large and upturned. Dentary with 4-5 teeth. Both sexes with a well developed fleshy dorsal crest. There are three preopercular pores. Supraorbital canals usually separate. First dorsal spine elongate in females. Body covered in cycloid scales, except for a patch of ctenoid scales under the pectoral fin.
Color
Body pale green to mauve with a purplish lateral stripe. The most obvious marking is a white bar under the dorsal origin bordered by bright white on both sides. The marking does not reach the belly. Head with orange and red cheeks and opercle and two brilliant blue to aqua stripes. Base of pectoral and pelvic fins bright blue. A small dark spot on the upper rear caudal peduncle. Eye dark. Dorsal fins magenta pink basally with a bright yellow median stripe and magenta border. Tail magenta with yellow spotting and a single transverse yellow band through the lower half. Lobe unmarked pale pink under band. Anal fin pink with a yellow basal stripe that runs contiguous with the tail stripe. Pelvic fin blue. Pectoral fin clear.
Size
Maximum size to 60mm SL.
Habitat
Sandy bottoms from 1-14m.
Range
Bahamas to Venezuela, mainly around islands.
References
Birdsong, R.S. 1981. A review of the gobiid fish genus Microgobius Poey. Bulletin of Marine Science v. 31 (no. 2): 267-306.
Tornabene, L. , J.L. van Tassell and D.R. Robertson. 2012. Microgobius urraca (Teleostei: Gobiidae), a new species of goby from the tropical eastern Pacific. Zootaxa No. 3447: 41-55.