Shorefishes of the Greater Caribbean online information system

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Species: Risor ruber, Tusked Goby

All Families:   All Genera:   All Species:

head round
brown + dark dots
snout overhangs small mouth
teeth protrude from closed mouth
pelvics form disc

Risor ruber (Rosen, 1911)

Tusked Goby

Body elongate, head rounded, snout very blunt; mouth opens under snout; top jaw with large, out-curved canine teeth; bottom jaw with large incurved canines, central canines on both jaws project out from mouth; no teeth on roof of mouth; gill membranes broadly joined to body under throat, with 5 rays; dorsal fin VII, none elongate, + I, 10-11; length of 2nd dorsal base > distance from 2nd dorsal base to tail fin; anal fin I, 8-9; pectoral fins 16-17 (16-18); pelvic fins I, 5, disk complete with well developed front membrane; caudal fin rounded; body scaled rearwards of anal fin origin, 14-19 in lateral series, 4-5 very rough scales on tail fin base; no lateral line.

Head and body translucent to dark grey or reed-brown, with dense small dark brown dots; body sometimes with ~ 4-5 internal irregular brown bars; sometimes a few, elongate white spots along spinal column; median fins speckled with dark dots.

Reaches: 2.5 cm.

Habitat: Found in association with large sponges, generally barrel sponges.

Depth: 1-180 m.

Georgia to Brazil.

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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Reef only
  • Sponges
  • Reef (rock/coral/oyster)
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Reef Associated
Feeding Group
  • Carnivore
  • Data
  • Planktivore
  • Data
  • Zooplankton
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic worms
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 North of GC
  • 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
  • Least concern
  • Listed
  • Not listed
Length Max
  • 2.5
Depth Range Min
  • 1
Depth Range Max
  • 180