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Species: Etropus ciadi, Cortez flounder

All Families:   All Genera:   All Species:

mouth ~ 29% head length
body height 47-60% SL
pectoral - dark tip + bar
LL straight, 36-43
pelvics: blind side > & before eye side
D 66-79: A 52-62

Etropus ciadi Van der Heiden & Plascencia, 2005

Cortez flounder

Body relatively deep (47-60%, mean 55% of SL); head small (22.1-26.6% SL); eyes on left side (uncommonly on right side),  close-set, lower one slightly before upper, a ridge between them that curves around and down behind lower eye to edge of preopercle; mouth relatively large for the genus, ends just behind front edge of lower eye, length < 30% of head length; jaws on blind side arched; most of teeth on blind side, in 1 row on each jaw, none enlarged; gill rakers 2-7 + 5-10; dorsal rays 66-79; anal rays 52-62; base of eye side pelvic on midline of body, 6 pelvic fin rays, blind-side fin a little longer than and with base in fin before that of eye-side fin; tail fin with blunt angular point; urinary papilla on blind side, immediately behind anus; lateral line starts at top corner of operculum, relatively straight; scales small, rough, easily dislodged, without small accessory scales; 36-43 lateral line scales.

Brown, with dark brown speckles on body and dorsal and anal fin rays, some grouped to form small spots; pectoral fin with dark tip and a wavy bar about 2/3 way along fin; males without dark pigment on blind side.

Reaches 11.6 cm.

Lives on soft bottoms.

Depth range 8-40m.

Known only from the eastern Gulf of California.

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  • Marine
  • Marine Only
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom only
  • Bottom
  • Sand & gravel
  • Soft bottom only
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Mud
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • No Data
  • Mobile benthic crustacea (shrimps/crabs)
  • No Data
  • Mobile benthic worms
  • Bony fishes
  • Octopus/squid/cuttlefish
Egg Type
  • No data
  • Pelagic larva
  • Pelagic
Global Endemism
  • All species
  • Tropical Eastern Pacific (TEP) endemic
  • East Pacific endemic
Regional Endemism
  • Cortez province endemic
  • Continent only
  • All species
  • Continent
  • TEP endemic
  • Continental TEP endemic
  • Resident
Climate Zone
  • North Temperate (Californian Province &/or Northern Gulf of California)
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Depth Range Min
  • 8
Depth Range Max
  • 40
Length Max
  • 11.6