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Species: Opsanus dichrostomus, Bicolor toadfish

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fins strong bars
D2 23-25
rear of lower 1/2 mouth dark
pectoral 17-19

Opsanus dichrostomus Collette, 2001

Bicolor toadfish

Head and front of body moderately depressed; head narrow (19.5-30.1% of SL), with many barbells, especially around lower jaw; distance between eyes < eye diameter; 2 solid spines on upper opercle and 1 below those; teeth molar-like to pointed, but no canines; gill openings restricted to side, before pectoral fin base; dorsal fin with 3 solid spines, spiny and soft parts joined, soft part 23-25, rarely 26; anal fin 20-22 rays; dorsal and anal fins not joined to tail fin; pectoral rays usually 17-19, discrete glands between upper pectoral rays on inner surface of fin; a pore opening to surface at rear of base of pectoral fin; 2 lateral lines, no light organs; no scales.

Head and body mottled, indistinct bars on body; rear of lower part of mouth dark in adults: soft dorsal and anal fins with ~10 oblique bars; tail fin with ~6 dark bars; pectoral fin barred.

Reaches 15 cm.

Lives on reefs.

Depth range: 1-5 m.

The southern Gulf of Mexico and NW Caribbean.

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  • Marine Only
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Reef (rock/coral/oyster)
  • Reef only
  • Corals
  • Rocks
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Reef Associated
Feeding Group
  • No Data
  • Carnivore
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic gastropods/bivalves
  • Bony fishes
  • Mobile benthic worms
Egg Type
  • Benthic
  • No pelagic larva
  • No data
Global Endemism
  • Greater Caribbean endemic
  • West Atlantic Endemic
Regional Endemism
  • Caribbean endemic
  • Continent
  • GC endemic
  • Island (s)
  • Continent + Island (s)
  • Resident
Climate Zone
  • Tropical (10-23N, Nicaragua / Cuba)
IUCN Red List
  • Not evaluated / Listed
  • Not listed
Length Max
  • 15
Depth Range Min
  • 1
Depth Range Max
  • 5