Shorefishes of the Eastern Pacific online information system

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Species: Malacoctenus sudensis, Southern blenny

All Families:   All Genera:   All Species:

behind eye: 2 dark spots
throat & belly spotted
border front D: dark blotch
behind chin 7-11 pores
A 22
LL 54-58
scales before D, not on pectoral base

Malacoctenus sudensis Springer, 1959

Southern blenny

Head slender, snout pointed; a close-set pair of heavily branched nape cirri, a branched cirrus over eye; upper part of rear end of top jaw covered by bone under eye; no small teeth behind outer row of large teeth on upper jaw; no teeth on sides of roof of mouth; gill rakers 11-12 (10-13); in adult 7-11 (5-20) pores  on underside of head between front ends of gill flaps; dorsal fin XX, 11, (XIX-XXI, 10-12), notch between spines and rays; anal II, 22 (18-21); pectoral 14 (13-14); 3 pelvic soft rays, length of shortest ray at least 57% of length of longest ray; 54-58 (52-60) lateral line scales; scales on belly smaller than those on flanks; midline in front of dorsal fin with at least one scale; scales  absent on prepectoral region, sometimes present on breast.

Back olive with series of 5 dark saddles; an irregular dark brown to blackish mid-lateral stripe; throat and lower side whitish with brown to blackish blotches and spots; a prominent double dark spot on head just behind eye; underside of head spotted; two large spots on the lower opercle; dorsal, tail, anal and pectoral fins spotted; upper part of membranes between first III-IV dorsal spines heavily pigmented; males similar to females

Size: attains 8 cm.

Habitat: rocky and rubble bottoms.

Depth: 1-10 m.

El Salvador to Ecuador.

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  • Marine Only
  • Marine
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom only
  • Bottom
  • Reef associated (reef + edges-water column & soft bottom)
  • Rocks
  • Reef only
  • Reef (rock/coral/oyster)
FishBase Habitat
  • Reef Associated
Feeding Group
  • Carnivore
  • No Data
  • Mobile benthic worms
  • No Data
  • Mobile benthic crustacea (shrimps/crabs)
Egg Type
  • No data
  • Pelagic larva
  • Benthic
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • East Pacific endemic
Regional Endemism
  • Continent
  • Continent only
  • Continental TEP endemic
  • Panamic province endemic
  • TEP endemic
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
IUCN Red List
  • Listed
  • Least concern
  • Not listed
Length Max
  • 8
Depth Range Min
  • 1
Depth Range Max
  • 10