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Species: Isopisthus remifer, Bigeye corvina, Silver weakfish

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elongate
D: large space between 2 parts
front top jaws: 1-2 large, curved canines
A long base (17-19), short spines

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Isopisthus remifer Jordan & Gilbert, 1882

Bigeye corvina, Silver weakfish

Body elongate, very compressed; eye large; mouth oblique, lower jaw strongly projecting; chin without barbells and pores; tip of top jaw with a pair of large, curved canine teeth; 7-10 lower gill rakers; preopercle weakly serrated; dorsal fin divided in two well separated parts, VII-IX+I-II, 21-23; anal fin with II short spines, base long, about equal to that of base of soft dorsal, 17-19 soft rays; pectoral fins long, reaching beyond tips of depressed pelvic fins; caudal fin bluntly pointed to straight; scales smooth; soft dorsal and anal fins entirely scaled; pored lateral-line scales 52-57.

Silver, bluish grey on upper back; tip of lower jaw and opercular lining black; pectoral axil dark; fins pale to yellowish.

Size: to 35 cm.

Inhabits coastal waters and lower parts of estuaries.

Depth: 4-50 m.

Southern Baja California, and the eastern Gulf of California to Chile.


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Salinity
  • Brackish
  • Non Marine
Inshore/Offshore
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Near Bottom
  • Mid Water
  • Bottom + water column
Habitat
  • Freshwater
  • Estuary
  • Sand & gravel
  • Mud
  • Water column
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
FishBase Habitat
  • Bentho-Pelagic
Feeding Group
  • Carnivore
  • Data
Diet
  • Octopus/squid/cuttlefish
  • Bony fishes
  • Mobile benthic crustacea (shrimps/crabs)
  • Data
Egg Type
  • Pelagic
  • Pelagic larva
  • No data
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • All species
  • East Pacific endemic
Regional Endemism
  • All species
  • TEP endemic
  • Continent
  • Continent only
  • 3 provinces (Cortez + Mexican + Panamic) endemic
  • Continental TEP endemic
Residency
  • Resident
Climate Zone
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • South Temperate (Peruvian Province )
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • North Temperate (Californian Province &/or Northern Gulf of California)
IUCN Red List
  • Least concern
  • Listed
CITES
  • Not listed
Length Max
  • 35
Depth Range Min
  • 4
Depth Range Max
  • 50