Shorefishes of the Eastern Pacific online information system

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Species: Chaenopsis coheni, Cohen's pike-blenny, Cortez pike-blenny

All Families:   All Genera:   All Species:

relatively slender
snout long
eye small
head spotted
operculum edge - dark above, spots below
D: 28-30, no ocellus, dark margin
A margin dark
center roof mouth no teeth
tongue short
pectoral 13

Chaenopsis coheni Böhlke, 1957


Cortez pike-blenny,     Cohen's pike-blenny


Body very elongate; head long; no cirri on head; snout relatively long (24-27% of head length), broad, rounded; rear nostrils ~ midway between front nostrils & eye; long mouth, usually reaching far behind eye, tip of lower jaw projecting; tongue short, tip not extending forward past teeth on sides of roof of mouth; no teeth at front of roof of mouth; dorsal fin XVIII-XX, 28-30, front half of fin a little elevated in adult males; anal rays II, 32-33; pectoral rays 13; tail fin rounded, joined to dorsal and anal fins.

(Preserved fish) Body translucent with series of 8-9 irregular blotches along mid-flank; head covered with dark dots, larger below; opercular membrane dark above, spotted below; dorsal and anal fins with dark margins; no ocellus on dorsal fin.

Size: 7.2 cm.

Habitat: rubble habitats near reefs.

Depth: 1-40 m.

The western Gulf of California and near Puerto Vallarta on the mainland.

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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Reef associated (reef + edges-water column & soft bottom)
  • Sand & gravel
  • Soft bottom only
  • Barnacles & worm tubes
FishBase Habitat
  • Demersal
Feeding Group
  • No Data
  • Planktivore
  • Carnivore
  • Mobile benthic crustacea (shrimps/crabs)
  • Data
  • Bony fishes
  • Pelagic fish eggs
  • Zooplankton
Egg Type
  • No data
  • Pelagic larva
  • Benthic
Global Endemism
  • East Pacific endemic
  • Tropical Eastern Pacific (TEP) endemic
  • All species
Regional Endemism
  • Continent only
  • TEP endemic
  • Cortez + Mexican provinces endemic
  • Continent
  • All species
  • Continental TEP endemic
  • Resident
Climate Zone
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
IUCN Red List
  • Listed
  • Data deficient
  • Not listed
Length Max
  • 7.2
Depth Range Min
  • 1
Depth Range Max
  • 40