Shorefishes of the Eastern Pacific online information system

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Species: Cynoscion squamipinnis, Scale-fin weakfish, Scalyfin corvina, Yellow-mouth weakfish

All Families:   All Genera:   All Species:

D VII-VIII + 1, 21-23
C: blunt point
mouth ends after eye, orange inside
lower gill rakers: 9-10
D2 & A ~all scaled
all scales rough

Cynoscion squamipinnis (Günther, 1867)

Scalyfin corvina, Scale-fin weakfish, Yellow-mouth weakfish

Elongate, fusiform, compressed, oval cross-section; head conical; 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; 9-10 lower gill rakers; margin of preopercle smooth; dorsal with long base, no gap separating the two parts, VII-VIII + I, 21-23; anal II, 9; pectoral fins reach beyond tips of depressed pelvic fins; tail fin angular, the middle rays longest; scales rough on body, smooth on head; inner ¾ to all of membranes of soft dorsal and anal fin covered with small scales; 51-61 scales on lateral line, these larger than adjacent rows and with small accessory scales.

Color silvery, greyish on upper back; tip of lower jaw dusky; inside of mouth yellow orange; pectoral axil dark; dorsal and anal fins dusky; tip of tail fin blackish.

Grows to a maximum size of 64 cm.

Inhabits coastal seas, common in shallow areas but not in estuaries.

Depth: 1-30 m.

Southern Baja to northern Peru.

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  • Brackish
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Near Bottom
  • Bottom + water column
  • Mid Water
  • Freshwater
  • Water column
  • Sand & gravel
  • Estuary
  • Flotsam
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
FishBase Habitat
  • Bentho-Pelagic
Feeding Group
  • Data
  • Carnivore
  • Data
  • Mobile benthic crustacea (shrimps/crabs)
  • Octopus/squid/cuttlefish
  • Bony fishes
Egg Type
  • Pelagic larva
  • Pelagic
  • No data
Global Endemism
  • East Pacific endemic
  • Tropical Eastern Pacific (TEP) endemic
  • All species
Regional Endemism
  • TEP endemic
  • 3 provinces (Cortez + Mexican + Panamic) endemic
  • Continent
  • Continental TEP endemic
  • All species
  • Continent only
  • Resident
Climate Zone
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 64
Depth Range Min
  • 1
Depth Range Max
  • 30