Shorefishes of the Eastern Pacific online information system

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Species: Etropus delsmani pacificus, Delsman's flounder

All Families:   All Genera:   All Species:

body height < 1/2 SL
mouth 24-30% head
violet-brown; LL: few blotches
pectoral: outer 1/2 dark
LL straight, 33-37
D 71-77; A 53-62

Etropus delsmani pacificus Nielsen, 1963

Delsman's flounder

Body relatively slender (height 41-44% of SL); head blunt, length 23-29% of SL; eyes on left side (uncommonly on right side), ~ parallel, top eye below upper head profile, with crest behind it; mouth very small, 24-30% 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 6-8; dorsal rays 71-77; anal rays 53-62; base of eye side pelvic on midline of body, 6 pelvic fin rays; pectoral fin 60-80% of head length; 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; 37-39 lateral line scales.

Eye side violet brown, a few dark blotches along lateral line, dorsal and anal with a few dark blotches; eye side pectoral dark outer half; blind side pale brown.

Size: 6 cm.

Habitat: sand and mud bottoms.

Depth: 45-50 m.

A Pacific subspecies of a neotropical species; Panama to Peru.

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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom only
  • Bottom
  • Soft bottom only
  • Sand & gravel
  • Mud
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • No Data
  • Octopus/squid/cuttlefish
  • Mobile benthic worms
  • Mobile benthic crustacea (shrimps/crabs)
  • No Data
  • Bony fishes
Egg Type
  • No data
  • Pelagic larva
  • Pelagic
Global Endemism
  • East Pacific endemic
  • Tropical Eastern Pacific (TEP) endemic
  • All species
Regional Endemism
  • TEP endemic
  • Panamic province endemic
  • Continent
  • All species
  • Continental TEP endemic
  • Continent only
  • Resident
Climate Zone
  • South Temperate (Peruvian Province )
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Not evaluated / Listed
  • Not listed
Length Max
  • 6
Depth Range Min
  • 45
Depth Range Max
  • 50