Shorefishes of the Eastern Pacific online information system

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Species: Atractoscion nobilis, White seabass, White weakfish

All Families:   All Genera:   All Species:

D X-XI, 21-23, deep notch
inner pectoral base: black blotch
no canines
belly with ridge

Atractoscion nobilis (Ayres, 1860)

White seabass, White weakfish

Body elongate, fusiform, compressed, oval cross-section; eye moderate; mouth opens at front, weakly oblique, lower jaw slightly projecting; no barbel or pores under chin;  teeth in multiple rows, front teeth pointed but are not canines; 13-18 gill rakers; preopercle with smooth edge; raised ridge down center of belly; dorsal with long base, deep notch between spiny and soft parts, X-XI, 21-23; anal fin II thin, short spines, 9-10 rays; pectoral and pelvics short; tail straight to slightly concave; scales small, all rough except smooth around eye; fins not scaly; 70-85 on lateral line.

Metallic blue to coppery above, with dark specks; belly silver; inner base of pectoral with black blotch; juveniles 3-6 dark bars on upper back, dusky yellow fins.

Size: 166 cm; 38 kg.

Habitat: rocky and algal bottoms.

Depth: 1-125 m.

Alaska to the Gulf of California.

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  • Brackish
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Sand & gravel
  • Rocks
  • Reef (rock/coral/oyster)
  • Reef associated (reef + edges-water column & soft bottom)
  • Estuary
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Reef and soft bottom
FishBase Habitat
  • Demersal
Feeding Group
  • Data
  • Carnivore
  • Octopus/squid/cuttlefish
  • Bony fishes
  • Data
Egg Type
  • Pelagic larva
  • Pelagic
  • No data
Global Endemism
  • All species
  • TEP non-endemic
  • East Pacific endemic
Regional Endemism
  • Tropical Eastern Pacific (TEP) non-endemic
  • Temperate Eastern Pacific, primarily
  • All species
  • Continent only
  • Continent
  • California province, primarily
  • Resident
Climate Zone
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • North Temperate (Californian Province &/or Northern Gulf of California)
IUCN Red List
  • Listed
  • Least concern
  • Not listed
Length Max
  • 166
Depth Range Min
  • 1
Depth Range Max
  • 125