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Bathygobius mystacium Ginsburg, 1947 Island frillfin |
| Family: | Gobiidae (Gobies), subfamily: Gobiinae | |||
| Max. size: | 15 cm TL (male/unsexed) | |||
| Environment: | demersal; marine | |||
| Distribution: | Western Atlantic: Florida, USA and the Bahamas to the Antilles and Espírito Santo, Brazil (Ref. 40101). | |||
| Diagnosis: | Dorsal spines (total): 7-7; Dorsal soft rays (total): 9-9; Anal spines: 1-1; Anal soft rays: 8-8. This species is distinguished by the following characters: 17-20 pectoral fin rays; 33-36 lateral scale rows; upper jaw length typically 9.2-11.0% SL (one specimen with 11.7%); predorsal squamation reaching anteriorly well beyond vertical through posterior margin of preopercle; first dorsal fin pigmentation variable, typically 1-3 longitudinal stripes with pale distal border of varying width, but sometimes uniformly dusky in larger specimens; trunk with 3 dorsal saddles sometimes reaching lateral midline and row of 6 large square to irregularly shaped blotches beneath lateral midline ranging in size from slightly larger than pupil to as large as or larger than orbit (Ref. 85559). | |||
| Biology: | Inhabits rocky tide pools and along water's edge, but mostly on unsheltered shores. | |||
| IUCN Red List Status: | Least Concern (LC); Date assessed: 01 March 2010 Ref. (130435) | |||
| Threat to humans: | harmless | |||