Shorefishes of the Eastern Pacific online information system

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Species: Citharichthys gnathus, Big-chinned sanddab

All Families:   All Genera:   All Species:

head & eyes large
snout long, strongly projecting
D 78-86; A 62-68
LL 44-50
chin - big sharp knob
lower gill rakers 16-20

Citharichthys gnathus Hoshino and Amaoka, 1999

Big-chinned sanddab

Body elongate (depth 35-44% SL) sharply wedge-shaped at rear; head large (28.5-36.3% SL); eyes on left side (uncommonly on right side); eyes large (25-33% head), lower one slightly before upper one, narrow between them, strong bony ridge over lower eye; snout long (5.5-6.3% of SL), very strongly projecting in adults; eyes on left side; mouth medium length ends under front of pupil of lower eye; tip of chin with a large pointed hook-like knob in adults; blind side jaws not arched; teeth ~ equally developed on both sides of jaws, in 1 series of immovable teeth on each jaw, no canines but front teeth a little enlarged; gill rakers slender, moderately long, 16-20 lower rakers; dorsal fin origin slightly before upper eye, 78-86 dorsal rays; 62-68 anal rays; eye side pectoral 85% of head length; base of eye-side pelvic on midline of body; urinary papilla on blind side, immediately behind anus; eye-side lateral line ~ straight, from edge of opercle to tail base; scales large, slightly rough on eye side, smooth on blind side; lateral line 44-50 scales.

Eye-side dark brown; blind-side pale brown.

Size: 16.1 cm.

Habitat: sandy bottoms.

Depth: 95 m.

The Galapagos Islands and Colombia.

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  • Marine Only
  • Marine
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom only
  • Bottom
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Soft bottom only
  • Sand & gravel
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • No Data
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic worms
  • Bony fishes
  • No Data
Egg Type
  • Pelagic larva
  • Pelagic
  • No data
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • East Pacific endemic
  • All species
Regional Endemism
  • Continent
  • Island (s)
  • Continent + Island (s)
  • All species
  • TEP endemic
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Data deficient
  • Listed
  • Not listed
Length Max
  • 16.1
Depth Range Min
  • 95
Depth Range Max
  • 95