Shorefishes of the Eastern Pacific online information system

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Species: Dialommus fuscus, Galapagos foureye blenny

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eyes and nape with cirri
very elongate
eye divided
A I, 28

Dialommus fuscus (Gilbert, 1891)

Galapagos foureye blenny

Body very elongate; head large, angular, depressed; 1-4 slender cirri over eye, 1 pair of short cirri on nape; surface of eye divided by fleshy bar; teeth in jaws forming narrow bands; teeth on center but not sides of roof of mouth; dorsal fin XXV, 13-15, a notch between spines and rays; anal fin with I, 28, short, stout spine has a fleshy covering; scales very small, smooth, ~ 60 in lateral series.

Light greenish to nearly black with series of 7-9 white blotches along base of dorsal fin, also diffuse white blotches along lower side; lips white and scattered white markings on head and pectoral fin, including a pair of large whitish areas on base of pectoral fin.

Size: grows to at least 12 cm.

Habitat: found in rocky areas of the intertidal zone, often seen above the water line resting on rocks.

Depth: 0-5 m.

Galapagos and Cocos Islands.

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  • Marine Only
  • Marine
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom only
  • Bottom
  • Rocks
  • Reef (rock/coral/oyster)
  • Reef only
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Demersal
Feeding Group
  • Data
  • Carnivore
  • Insects
  • Data
  • Mobile benthic crustacea (shrimps/crabs)
Egg Type
  • No data
  • Pelagic larva
  • Benthic
Global Endemism
  • All species
  • East Pacific endemic
  • Tropical Eastern Pacific (TEP) endemic
Regional Endemism
  • Multiple oceanic islands endemic
  • Island (s) only
  • Island (s)
  • TEP oceanic island (s) endemic
  • All species
  • TEP endemic
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Listed
  • Vulnerable
  • Not listed
Length Max
  • 12
Depth Range Min
  • 0
Depth Range Max
  • 5