Shorefishes of the Eastern Pacific online information system

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Species: Pronotogrammus eos, Bigeye bass

All Families:   All Genera:   All Species:

elongate oval; very large eye
pink; C & soft D - yellow spots
C: forked, sharp tips
pectoral passes A origin
pelvic - no long rays, yellow

Pronotogrammus eos Gilbert, 1890

Bigeye bass

Body an elongate oval, narrowing to tail base; upper and lower head profiles convex; very large eye (diameter = 12-16% of SL); mouth moderately oblique, lower jaw projecting, top jaw bone without additional bone above; a patch of granular teeth on tongue; preoperculum finely serrated on rear and lower edges; 11-13 long rakers on upper limb of first gill arch; dorsal fin X (4th-9th  ~ equal and longer than 3rd), 14-15; anal III, 8; pectoral 17-19, long, reaches past origin of anal fin; pelvic fins long, but without elongate rays; tail deeply forked, with sharp tips; 36-40 lateral scales; two rows of large scales between base of dorsal fin and lateral line; head and jaws fully scaled.

Head and body pink above, silver below; a curved yellow stripe from snout to under eye, yellow blotches on operculum; a series of vertically elongate yellowish blotches along mid-side of body; fins pinkish, with small yellowish spots on upper tail lobe and on soft dorsal, yellow edges to the remaining fins.

Size: to 21 cm.

Habitat: probably aggregates over rock, sand and shell bottoms.

Depth: 80- 325 m.

SW and eastern middle Gulf of California to Panama, and Cocos.

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  • Marine Only
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Near Bottom
  • Bottom + water column
  • Bottom
  • Rocks
  • Water column
  • Reef associated (reef + edges-water column & soft bottom)
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Sand & gravel
  • Reef and soft bottom
  • Reef (rock/coral/oyster)
FishBase Habitat
  • Bathydemersal
Feeding Group
  • Data
  • Planktivore
  • Pelagic fish eggs
  • Zooplankton
  • No Data
  • Pelagic fish larvae
Egg Type
  • Pelagic larva
  • Pelagic
  • No data
Global Endemism
  • All species
  • East Pacific endemic
  • Tropical Eastern Pacific (TEP) endemic
Regional Endemism
  • All species
  • TEP endemic
  • Island (s)
  • Continent
  • Continent + Island (s)
  • Resident
Climate Zone
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
IUCN Red List
  • Not evaluated / Listed
  • Not listed
Length Max
  • 21
Depth Range Min
  • 80
Depth Range Max
  • 325