Shorefishes of the Greater Caribbean online information system

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Species: Etropus crossotus, Fringed Flounder

All Families:   All Genera:   All Species:

body deep
scale edges & C margin dark
lower gill rakers 7-8
LL straight
scales: snout no, accessory no

Etropus crossotus Jordan & Gilbert, 1882

Fringed Flounder

Body relatively deep (50-58% of SL); head short, pointed (20-27% of SL); eyes on left side, top eye at top edge of head; space between eyes very narrow, the ridge over each eye coalesced; mouth very small, 23-26% of head, ends under front edge of eye; jaws on blind side arched; most of teeth on blind side, in 1 row on each jaw, none enlarged; lower gill rakers 7-8 (6-9); dorsal fin rays 73-84; anal fin rays 57-67; pectoral fins on both sides of body, with branched rays, fin 50-75% of head length, 10 rays; pelvic fins symmetrically positioned on belly, base of eye-side fin on body midline, short bases, 6 rays; tail fin with blunt angular point; urinary papilla on blind side, immediately behind anus; lateral line well developed on both sides, starts at top corner of operculum, complete, relatively straight, no branch under lower eye; scales small, rough on eye side, smooth on blind side, easily dislodged, without small accessory scales; no scales on snout; 38-45 lateral line scales.

Dark brown, with narrow black scale margins; median fins dusky blackish; outer edge of tail fin often dark; males often with dark pigment on rear half of blind side.

Size: to 22 cm.

Inhabits soft mud and sand bottoms.

Depth: 1-110 m.

West Atlantic and E Pacific; Virginia to Brazil.

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  • Brackish
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Sand & gravel
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Soft bottom only
  • Estuary
  • Mud
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • Data
  • Data
  • Bony fishes
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic gastropods/bivalves
  • Sessile worms
Egg Type
  • Data
  • Pelagic
  • Pelagic larva
Global Endemism
  • All species
  • Greater Caribbean non-endemic
  • New world (East Pacific + West Atlantic)
  • Transisthmian (East Pacific + Atlantic of Central America)
Regional Endemism
  • Also in Brazil
  • Continent
  • Continent + Island (s)
  • Continental primarily
  • 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
  • 22
Depth Range Min
  • 1
Depth Range Max
  • 110