Shorefishes of the Eastern Pacific online information system

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Species: Paraclinus monophthalmus, One-eyed Blenny

All Families:   All Genera:   All Species:

nape cirrus: small triangle
D:, 1st spine low, 1ray, border white
black blotch top operculum
A dark, white margin
LL 36-40

Paraclinus monophthalmus (Günther, 1861)

One-eyed Blenny

Elongate, snout bluntly pointed; cirri present on nostril, above eye (branched), and on nape (narrow triangular flap); opercle with a distinct spiny projection; dorsal fin XXVIII-XXX, 1, 1st spine < 10% of SL, front 3 spines elevated then a deep notch before 4th spine, membrane between 3rd and 4th dorsal spines usually attached well below midpoint of 4th spine; anal rays II, 19-21; pectoral rays 11-14; pelvic I, 3; all fin rays unbranched; lateral-line scales 36-40; no skin flaps on scales.

Greyish to blackish; with faint dark bars on side; a black spot on upper part of gill cover; dorsal fin with broad white margin and ocellus on rear half; anal fin dark, with thin white margin; tail fin clear, with black bar at base.

Size: attains 8.5 cm.

Habitat: relatively rare, found in shallow weedy areas.

Depth: 0-5 m.

El Salvador to Panama.

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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom only
  • Bottom
  • Reef (rock/coral/oyster)
  • Submerged vegetation
  • Reef associated (reef + edges-water column & soft bottom)
  • Reef only
  • Rocks
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • No Data
  • No Data
  • Mobile benthic worms
  • Octopus/squid/cuttlefish
  • Mobile benthic crustacea (shrimps/crabs)
Egg Type
  • Pelagic larva
  • No data
  • Benthic
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • East Pacific endemic
  • All species
Regional Endemism
  • All species
  • Continental TEP endemic
  • Continent
  • TEP endemic
  • Continent only
  • Panamic province endemic
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Listed
  • Least concern
  • Not listed
Length Max
  • 8.5
Depth Range Min
  • 0
Depth Range Max
  • 5