Shorefishes of the Eastern Pacific online information system

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Species: Cynoscion stolzmanni, Stolzmann's weakfish, Yellowtail corvina, Yellowtail weakfish

All Families:   All Genera:   All Species:

head conical, top profile slightly concave
D X + I, 19-21
C: S shape, yellow
inside operculum & pectoral base: black
in mouth orange, dark crescent behind lower teeth
pectoral < pelvic
all scales rough
D2 & A scaleless

Cynoscion stolzmanni (Steindachner, 1879)

Yellowtail corvina, Stolzmann's weakfish, Yellowtail weakfish

Elongate, fusiform, compressed, oval cross-section; head conical, upper profile straight, slightly concave over eye; mouth strongly oblique, ends after eye, lower jaw very prominent; front of top jaws with 1 pair of large pointed canines; no pores or barbels on chin; 8-9 lower gill rakers; margin of preopercle smooth; dorsal with long base, no gap separating the two parts, X + I, 19-21; anal II, 8-9; pectoral fins short, ending well short of tips of depressed pelvic fins; tail fin S-shaped, more sharply pointed in young; scales in head and body rough, a few smooth scales around eye and on underside of head; soft dorsal fin and anal fin without a scaly sheath; 60-61 scales on lateral line, these larger than adjacent rows and with small accessory scales.

Color silver, steel blue on upper back; inside operculum and pectoral axil black; inside of mouth orange,  a dark crescent behind center of lower teeth; soft dorsal with dusky margin; tail fin yellow; other fins yellowish.

Size: attains at least 90 cm.

Inhabits coastal waters, including estuaries.

Depth: 1-30 m.

The mouth of the Gulf of California to Peru.

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  • Brackish
  • Marine
  • Inshore Only
  • Inshore
Water Column Position
  • Near Bottom
  • Mid Water
  • Bottom + water column
  • Bottom
  • Sand & gravel
  • Water column
  • Freshwater
  • Estuary
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
FishBase Habitat
  • Demersal
Feeding Group
  • Data
  • Carnivore
  • Bony fishes
  • Mobile benthic crustacea (shrimps/crabs)
  • Data
  • Octopus/squid/cuttlefish
Egg Type
  • Pelagic
  • No data
  • Pelagic larva
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • East Pacific endemic
  • All species
Regional Endemism
  • Continent only
  • All species
  • Continent
  • Continental TEP endemic
  • TEP endemic
  • 3 provinces (Cortez + Mexican + Panamic) endemic
  • Resident
Climate Zone
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • South Temperate (Peruvian Province )
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
IUCN Red List
  • Listed
  • Least concern
  • Not listed
Length Max
  • 90
Depth Range Min
  • 1
Depth Range Max
  • 30