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Species: Hemicaranx zelotes, Blackfin jack

All Families:   All Genera:   All Species:

fins dark to black
juvenile: 4-5 dark bars
teeth - 1 row, like comb
pectoral: base black, reaches A origin
tail base scutes high

Hemicaranx zelotes Gilbert in Jordan & Evermann, 1898

Blackfin jack

Body oval, moderately compressed in adult; both jaws with comb-like single row of small teeth; no papillae on edge of shoulder immediately after gill chamber; gill rakers (excluding rudiments) 7-10 + 18-23; dorsal rays VII-VIII+I, 25-31;  anal rays II+I, 22-25; no finlets behind dorsal and anal fins; pectoral fins longer than head, length of fin 23-29% of fork length, fin reaches anal fin origin; tail base without keels; no branch of lateral line along besides base of dorsal fin; lateral line with pronounced, short arch anteriorly; straight rear part (but not curved front part) of lateral line with 47-55 well developed scutes (large, hard, spiny scales); scutes on front of tail base relatively relatively high (1.9-3.6% of SL);  most of body with small but easily visible scales.

Dark olive to deep blue above, dusky silvery below; a large jet-black blotch on base of pectoral fins; fins dark, not yellow; juveniles with 4-5 dark bars on side.

Maximum size to 32.5 cm.

Habitat: over soft bottoms. Common inshore, often found in schools.

Depth: 0-30 m.

Southern Baja and the lower Gulf of California to northern Peru.

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  • Marine
  • Brackish
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom + water column
  • Bottom
  • Near Bottom
  • Near Surface
  • Mid Water
  • Water column
  • Estuary
  • Sand & gravel
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
FishBase Habitat
  • Bentho-Pelagic
Feeding Group
  • No Data
  • Carnivore
  • Bony fishes
  • No Data
  • Mobile benthic crustacea (shrimps/crabs)
Egg Type
  • Pelagic larva
  • Pelagic
  • No data
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • All species
  • East Pacific endemic
Regional Endemism
  • Continent
  • Continental TEP endemic
  • All species
  • Continent only
  • 3 provinces (Cortez + Mexican + Panamic) endemic
  • TEP endemic
  • Resident
Climate Zone
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • South Temperate (Peruvian Province )
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 32.5
Depth Range Min
  • 0
Depth Range Max
  • 30