Shorefishes of the Eastern Pacific online information system

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Species: Arcos decoris, Elegant clingfish

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front nostril: flap divided
tan + blue spots
top jaw with canines

Arcos decoris Briggs, 1969

Elegant Clingfish

Tadpole shaped, with flattened body and wide flattened head; front nostril with a divided flap; a few fleshy lobes under chin, but nowhere else on head; top lip broad, much wider at front than at sides; upper jaw with 2-3 pairs of rounded incisors at front followed on each side by 2-3 canines and then a row of small conical teeth; lower jaw with 4 pairs of rounded incisors followed by 2-3 canines and then a row of small conical teeth; sucker very large, front and rear parts with a broad band of papillae, central part with 2 close-set patches of papilla, 6-7 rows of flattened papillae across width of front of sucker disc, 8-9 rows across rear of disc, 3 longitudinal rows on each central patch; small flattened fleshy pad on pectoral base without a free posterior margin; dorsal rays 7-8; anal rays 8-9; pectoral rays 22-24; caudal rays 9-10.

Yellowish tan with numerous small blue dots on dorsal portion of head and body; several darkish bars sometimes evident across back.

Size: to 3 cm.

Inhabits rocky shores.

Depth: 0-10 m?.

Panama to Colombia, and Cocos Island.

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Species Data Create Report Export as Word File Export as Excel File
  • Marine Only
  • Marine
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom only
  • Bottom
  • Reef associated (reef + edges-water column & soft bottom)
  • Reef (rock/coral/oyster)
  • Rocks
  • Reef only
FishBase Habitat
  • Demersal
Feeding Group
  • No Data
  • Carnivore
  • Mobile benthic crustacea (shrimps/crabs)
  • Benthic microalgae
  • Data
  • Mobile benthic gastropods/bivalves
  • Mobile benthic worms
  • Zooplankton
Egg Type
  • Pelagic larva
  • No data
  • Benthic
Global Endemism
  • All species
  • East Pacific endemic
  • Tropical Eastern Pacific (TEP) endemic
Regional Endemism
  • Island (s)
  • Continent + Island (s)
  • TEP endemic
  • Continent
  • All species
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 3
Depth Range Min
  • 0
Depth Range Max
  • 10