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Species: Parablennius marmoreus, Seaweed Blenny

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eye cirrus long, branches at base
lower head - blue bars
color & pattern v variable: spotted, striped, all yellow
D spot at front

Parablennius marmoreus (Poey, 1876)

Seaweed Blenny

Body and head compressed; a cirrus with several branches over each eye, no cirri on nape, front nostril with a flap; jaw teeth in single rows, fixed, bluntly pointed, with a canine tooth at rear of top and bottom jaws, canines larger in males; gill membranes free, forming a transverse flap under throat; dorsal fin XII, 17-18, with barely a notch between spiny and soft parts; anal fin II, 19-20; pectoral fin 14; fin rays unbranched, except on tail fin; tail fin bluntly rounded; lateral line in one part, short (11-13 pores), ends under dorsal spines; no scales.

Variable in color and pattern: some fish are entirely yellow; others are pale tan, red-brown or orangish; thin blue bars radiating down from eye; orange spots on head and brown spots on side that may be clustered and in several rows, the central row sometimes forming a broad stripe from head to tail; some fish are whitish with a black stripe along the top of the back of the front 2/3 of the body and another along the upper side that extends through each eye and across between them; an ocellus at front of dorsal fin.

Reaches 10.8 cm.

Lives on rocky, weedy reefs; young sometimes with floating Sargassum.

Depth range: 0-35 m.

New York to southern Brazil.

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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Reef only
  • Rocks
  • Submerged vegetation
  • Barnacles & worm tubes
  • Flotsam
  • Reef (rock/coral/oyster)
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Reef Associated
Feeding Group
  • Corallivore
  • Data
  • Omnivore
  • Data
  • Soft corals/hydroids
  • Sponges/seasquirts/bryozoa
  • Benthic microalgae
  • Mobile benthic gastropods/bivalves
  • Mobile benthic worms
  • Sea-stars/cucumbers/urchins
Egg Type
  • Benthic
  • Data
  • Pelagic larva
Global Endemism
  • All species
  • Greater Caribbean non-endemic
  • West Atlantic Endemic
Regional Endemism
  • Also in Brazil
  • Continent
  • Continent + Island (s)
  • Extends N + S of GC
  • Extends North of GC
  • Extends South of GC
  • GC non-endemic
  • Island (s)
  • All species
  • Resident
Climate Zone
  • Equatorial (0-10N, Costa Rica / Venezuela)
  • Subtropical (23-35N, Florida / Carolinas / Bermuda)
  • Temperate (>35N)
  • Tropical (10-23N, Nicaragua / Cuba)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 10.8
Depth Range Min
  • 0
Depth Range Max
  • 35