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Species: Bathygobius geminatus, Twinspotted Frillfin, Twinspotted Frillfin Goby

All Families:   All Genera:   All Species:

nape scales - > preopercle edge, +/- a few before
lower body: 2 paired rows 6-8 oval blotches
pectoral 17-18
lateral scales 36-38

Bathygobius geminatus Tornabene et al, 2010

Twinspotted Frillfin, Twinspotted Frillfin Goby

Body robust; head broad, depressed, with pores; snout bluntly rounded; eyes large, close together; mouth moderate sized, relatively horizontal; upper jaw length 10.3-10.7% SL; tongue with deep notch in front; jaw teeth in bands, without canines; gill membranes broadly joined to body under throat, with 5 rays; dorsal fins VI (none elongate) + I, 9 rays; length of 2nd dorsal base > distance from 2nd dorsal base to tail fin; anal I, 8 rays; pelvic fins fused into a disc; pectoral 17-18, upper 3-5 rays free, silky threads; tail round; scales large, rough, 37 (36-38) on mid-side, present on midline of nape reaching to a line through rear edge of preopercle, with a few scales sometimes extending before that line; no scales on cheek or operculum; no lateral line.

Grayish brown; upper body with 3 indistinct dark saddles; lower body with 2 rows of 6-8 horizontally elongated, vertically aligned dark spots from under pectoral fin to just before dark spot on tail fin base; spines of1st dorsal fin with 2-3 horizontal lines of dark spots across fin; 2nd dorsal fin with thin dark stripes and yellowish outer edge; tail fin with 1-3 small dark blotches on its base and thin dark bars on its outer part.

Reaches 4.7 cm.

Depth: 0-3 m.

Habitat: Sheltered rock and sand habitats, near mouths of small streams.

Distribution: SE Florida, Puerto Rico, Curacao, the NW Caribbean; Brazil.

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  • Brackish
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Rocks
  • Sand & gravel
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Beach
  • Estuary
  • Mud
  • Reef (rock/coral/oyster)
  • Reef and soft bottom
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Demersal
  • Reef Associated
Feeding Group
  • Carnivore
  • Data
  • Data
  • Mobile benthic crustacea (shrimps/crabs)
Egg Type
  • Benthic
  • Data
  • Pelagic larva
Global Endemism
  • All species
  • Greater Caribbean non-endemic
  • West Atlantic Endemic
Regional Endemism
  • Also in Brazil
  • Continent
  • Continent + Island (s)
  • Extends South of GC
  • GC non-endemic
  • Island (s)
  • All species
  • Resident
Climate Zone
  • Equatorial (0-10N, Costa Rica / Venezuela)
  • Subtropical (23-35N, Florida / Carolinas / Bermuda)
  • Tropical (10-23N, Nicaragua / Cuba)
IUCN Red List
  • Data deficient
  • Listed
  • Not listed
Length Max
  • 4.7
Depth Range Min
  • 0
Depth Range Max
  • 3