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Species: Cratinus agassizii, Grey threadfin sea-bass

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head long, low, pointed
D: X, middle spines longer than head

Cratinus agassizii Steindachner, 1878

Grey threadfin sea-bass

Body elongate; head long, low and pointed; mouth large, oblique, lower jaw proyecting; preopercle serrated; rakers on first gill arch 19-20; dorsal rays X, 13; third to fifth (sometimes also sixth and seventh) dorsal spines prolonged and bearing filaments; at least in adults; anal rays III, 7; pectoral rays 19; midlateral scale rows about 80-90; scales small, very rough; tail edge straight.

Grey to brown, sometimes 6-7 faint dark bars on side.

Size: grows to at least 61 cm.

Inhabits mangrove areas and shallow bays, occasionally seen on rocky reefs.

Depth: 1-25 m.

Ecuador to northern Peru, and the Galapagos.

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Species Data Create Report Export as Word File Export as Excel File
  • Brackish
  • Marine
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom
  • Bottom only
  • Reef associated (reef + edges-water column & soft bottom)
  • Estuary
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Reef and soft bottom
  • Reef (rock/coral/oyster)
  • Rocks
FishBase Habitat
  • Demersal
Feeding Group
  • Data
  • Carnivore
  • Data
  • Bony fishes
Egg Type
  • Pelagic larva
  • Pelagic
  • No data
Global Endemism
  • TEP non-endemic
  • East Pacific endemic
  • All species
Regional Endemism
  • Continent + Island (s)
  • Temperate Eastern Pacific, primarily
  • Continent
  • Peruvian province, primarily
  • All species
  • Island (s)
  • Tropical Eastern Pacific (TEP) non-endemic
  • Resident
Climate Zone
  • South Temperate (Peruvian Province )
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Near threatened
  • Listed
  • Not listed
Length Max
  • 61
Depth Range Min
  • 1
Depth Range Max
  • 25