Shorefishes of the Greater Caribbean online information system

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Species: Robinsichthys nigrimarginatus, Black Margined Goby

All Families:   All Genera:   All Species:

black bars: through eye 5 on body
D1: large black blotch
D2 & C: black edges
D VI+ 1,9
pelvics fused - round disc
A, I,9
C base: 2 large rough scales
body - rough scales

Robinsichthys nigrimarginatus Tornabene, Manning, Robertson, Van Tassell & Baldwin, 2022

Black Margined Goby

Head profile straight; eyes large; a groove present between upper lip and snout; no head pores; front nostril a short tube, rear nostril a hole; teeth in both jaws in 2 rows, teeth thin, straight, pointed; gill rakers 9+1; gill membranes broadly joined to body under throat, with 5 rays; dorsal fin VI + I, 9; length of 2nd dorsal base > distance from 2nd dorsal base to tail fin; anal fin I, 9; pectoral fin 19; pelvic fins I, 5, all rays branched, fins completely joined by a membrane to form a round disc, rearch to just before anus, tips of rays not ending in fleshy pads; tail fin blunt, straight rear edge, 17 segmented rays, 14 branched rays; body scaled from inside pectoral to rear, with 24 rough scales in lateral series, a pair of very rough scales on tail fin base; rough scales on abdomen; no lateral line.

Body pale; head with black bar through eye down to mouth; body with 5 blackish bars, one under 1st dorsal fin, two under 2nd dorsal fin, one on tail base, one on base of tail fin; fins translucent; 1st dorsal with a large black blotch on outer third; second dorsal and tail fins with blackish edges.

Reaches: 2.5 cm.

Habitat: Sand substrate next to reef.

Depth 229 m.


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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Sand & gravel
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Soft bottom only
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Reef Associated
Feeding Group
  • Carnivore
  • No Data
  • No Data
Egg Type
  • Benthic
  • No data
  • Pelagic larva
Global Endemism
  • All species
  • Greater Caribbean endemic
  • West Atlantic Endemic
Regional Endemism
  • Caribbean endemic
  • GC endemic
  • Island (s)
  • Island (s) only
  • All species
  • Resident
Climate Zone
  • Equatorial (0-10N, Costa Rica / Venezuela)
IUCN Red List
  • Not evaluated / Listed
  • Not listed
Length Max
  • 2.5
Depth Range Min
  • 229
Depth Range Max
  • 229