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Species: Cathorops tuyra, Besudo sea-catfish

All Families:   All Genera:   All Species:

head groove narrow, 2 parts
mouth small, lips thick & fleshy
rear lower jaw: large molars
roof mouth: 1 pair patches large molar teeth
gill opening - side only
gill rakers 19-22
A 19-20
C lobes narrow, pointed

Cathorops tuyra (Meek & Hildebrand, 1923)

Besudo sea-catfish

Body moderately elongate; head small; snout long, pointed; top of head rough on rear half, covered with thin skin; central groove in top of head narrow, front part snout short or absent, rear part behind eye, with straight, tapering edges; bone projecting back from head shield triangular, with wide base, longer than wide, with a central keel, its length 11.2-13.7%SL; plate before dorsal spine with length 6.7-7.5%SL; 3 pairs of barbells (on chin and both jaws); mouth small; lips fleshy, often thick; lower jaw bones very wide, with large molar teeth at rear; teeth at front of top jaw fine, in two articulated patches; one pair of well separated, oblique, elongated patches of large molariform teeth on roof of mouth; gill opening restricted to sides by adhesion of gill membranes to breast; gill rakers 19-22; rakers on posterior surface of all arches; dorsal rays I,7, spine at least as thick as pectoral spine; anal rays 19-20; pectoral rays I, 10-11;tail fin lobes narrow and pointed.

Grey on back and sides, white below; fins dusky bluish grey.

Maximum size to 30 cm.

Inhabits brackish and fresh water.

Depth: 0-20 m.

Costa Rica to Peru.

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  • Brackish
  • Freshwater
  • Non Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom only
  • Bottom
  • Freshwater
  • Sand & gravel
  • Mud
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Soft bottom only
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • No Data
  • Mobile benthic gastropods/bivalves
  • Bony fishes
  • Mobile benthic crustacea (shrimps/crabs)
  • No Data
  • Mobile benthic worms
Egg Type
  • No data
  • No pelagic phase
  • Brooded
  • No pelagic larva
Global Endemism
  • All species
  • Tropical Eastern Pacific (TEP) endemic
  • East Pacific endemic
Regional Endemism
  • All species
  • Continental TEP endemic
  • Continent
  • Panamic province endemic
  • TEP endemic
  • Continent only
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • South Temperate (Peruvian Province )
IUCN Red List
  • Data deficient
  • Listed
  • Not listed
Length Max
  • 30
Depth Range Min
  • 0
Depth Range Max
  • 20