Shorefishes of the Greater Caribbean online information system

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Species: Gephyroberyx darwinii, Big Roughy, Darwin's Slimehead

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D VIII, spiny base not < A base
opercle - strong spine
LL scales slightly enlarged, with small spine

Gephyroberyx darwinii (Johnson, 1866)

Big Roughy, Darwin's Slimehead

Body oblong, compressed; head large, with extensive skin-covered sensory canals separated by spiny ridges; eyes moderate to large; snout rounded, with a pair of forward pointing spines; mouth large and oblique; an extra bone above rear of top jaw; teeth small, simple, in bands; preopercle with a flat triangular spine; a large spine projecting back from top corner of operculum; anus just before anal fin; 1 dorsal fin with VIII (rarely VII) striated spines and 12-18 soft rays, base of spiny part not shorter than anal fin base; anal fin II-III, 11-12, short base; tail fin forked, with 4-8 short, spiny rays at top and bottom of its base; scales thick and spiny; 12-14 large keeled scales along midline of belly between pelvic and anal fins; lateral line scales a little larger than surrounding scales and each with a small, flat, triangular spine.

Silvery red, body paler below, fins more strongly colored; inside gill chamber black.

Reaches 60 cm.

Outer edges of continental shelves and island shelves; near and above hard bottoms.

Depth range: 10-1250 m, usually below 75 m.

E and W Atlantic, and the Indo-W Pacific; Delaware to Argentina.

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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom + water column
  • Mid Water
  • Near Bottom
  • Rocks
  • Water column
  • Corals
  • Reef (rock/coral/oyster)
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Bentho-Pelagic
  • Reef Associated
Feeding Group
  • Carnivore
  • Data
  • Planktivore
  • Data
  • Zooplankton
  • Bony fishes
  • Mobile benthic crustacea (shrimps/crabs)
Egg Type
  • Data
  • Pelagic
  • Pelagic larva
Global Endemism
  • All species
  • Circumtropical ( Indian + Pacific + Atlantic Oceans)
  • Greater Caribbean non-endemic
Regional Endemism
  • Also in Brazil
  • Continent
  • Continent + Island (s)
  • Extends N + S of GC
  • 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)
  • Temperate (>35N)
  • Tropical (10-23N, Nicaragua / Cuba)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 60
Depth Range Min
  • 10
Depth Range Max
  • 1250