Species: Dialommus macrocephalus, Foureye rockskipper
eyes & nape - no cirri
very elongate
eye divided
eye divided
A II, 24
Dialommus macrocephalus (Günther, 1861)
Foureye rockskipper
Body very elongate; head large, angular, depressed; no cirri over eye or 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 XXII, 12-13, a notch between spines and rays; anal fin with II, 24, short, stout spines have a fleshy covering; scales very small, smooth, ~ 75 in lateral series.
Dark greyish with light and dark mottlings; head blackish; small white spots present on head, pectoral fin base, and upper back.
Maximum recorded size 11 cm.
Habitat: occurs in very shallow water along rocky shores.
Depth: 0-5 m.
The tip of Baja California and central Mexico to Colombia.
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Species Data
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- Salinity
-
- Marine
- Marine Only
- Inshore/Offshore
-
- Inshore Only
- Inshore
- Water Column Position
-
- Bottom
- Bottom only
- Habitat
-
- Reef only
- Reef associated (reef + edges-water column & soft bottom)
- Reef (rock/coral/oyster)
- Rocks
- FishBase Habitat
-
- Demersal
- Feeding Group
-
- Carnivore
- No Data
- Diet
-
- Mobile benthic crustacea (shrimps/crabs)
- Data
- Insects
- Egg Type
-
- No data
- Pelagic larva
- Benthic
- Global Endemism
-
- East Pacific endemic
- Tropical Eastern Pacific (TEP) endemic
- All species
- Regional Endemism
-
- TEP endemic
- 3 provinces (Cortez + Mexican + Panamic) endemic
- Continental TEP endemic
- Continent only
- Continent
- All species
- Residency
-
- Resident
- Climate Zone
-
- Northern Subtropical (Cortez Province + Sinaloan Gap)
- Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
- Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
- IUCN Red List
-
- Least concern
- Listed
- CITES
-
- Not listed
- Length Max
-
- 11
- Depth Range Min
-
- 0
- Depth Range Max
-
- 5
