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Species: Pinnichthys bilix, Double-filament goby

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eyes large, high
no head pores
pectoral 19-20
D2 11: A 10-11
D1: spines I & II filamentous D2 I, 11
no lower canines
lateral scales 30-32
belly scaled

Pinnichthys bilix (Hastings & Findley, 2013)

Double-filament goby

Body compressed, deep, robust; head plump, slightly wider than deep, cheeks not puffed; head without pores; eyes large, close together, at top of head profile; most parts of head and nape with papillae; anterior and posterior nostrils tubular, front one longer; tongue tip slightly notched; lower jaw without large canines; gill membranes broadly joined to body under throat, with 5 rays; gill rakers 11; dorsal fin VII (spines I&II very long, filamentous, in females reach to between bases of 1st & last ray of 2nd dorsal + I, 11; length of 2nd dorsal base > distance from 2nd dorsal base to tail fin; anal fin I, 10-11; pectoral 19-20, pelvic fins I, 5, completely separate, rays  1-4 branched, 4th reaching to anus, 5th ray not branched, well developed, slightly > 2nd ray, longer than pelvic spine, tips of most rays slightly flattened; head & front of body scaleless, scales in lateral series 30-32, originate under pectoral axil, most are weakly rough, smooth on belly & around outside of rough patch on body;  belly scaled; probably with large very rough scales on tail fin base; no lateral line.

Preserved fish pale yellowish; an indistinct dark blotch on end of tail base.

Reaches 4 cm.

Habitat: rock and sand.

Depth: 62-138 m.

Northern Bahamas to the southern Caribbean.

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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom only
  • Bottom
  • Reef (rock/coral/oyster)
  • Reef and soft bottom
  • Reef associated (reef + edges-water column & soft bottom)
  • Rocks
  • Sand & gravel
FishBase Habitat
  • Reef Associated
Feeding Group
  • Carnivore
  • No Data
  • Mobile benthic crustacea (shrimps/crabs)
  • No Data
Egg Type
  • Benthic
  • Pelagic larva
  • No data
Global Endemism
  • West Atlantic Endemic
  • Greater Caribbean endemic
Regional Endemism
  • Island (s)
  • GC endemic
  • Continent
  • Continent + Island (s)
  • Resident
Climate Zone
  • Tropical (10-23N, Nicaragua / Cuba)
  • Subtropical (23-35N, Florida / Carolinas / Bermuda)
  • Equatorial (0-10N, Costa Rica / Venezuela)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 4
Depth Range Min
  • 62
Depth Range Max
  • 138