Fauna
Fish

Atlantic Crevalle Jack

Caranx hippos

Also known as Common Jack, Couvalli Jack, Black Cavalli, Yellow Cavalli

Atlantic crevalle jacks are powerful apex schooling predators known for explosive surface blitzes as they corral schools of forage fish into tight bait balls. Adult fish frequently cruise along coastlines, reef edges, and brackish bays, producing audible croaking sounds using their swim bladders when stressed or competing. Young jacks often ride ocean currents into warm estuaries and mangroves, relying on protected nursery shallows before migrating back to deeper tropical waters ahead of winter chills.

PredatorySchoolingPelagic
Atlantic Crevalle Jack reference
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Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preyMenhaden, Striped Mullet, Squid
Predators
  • Bull Shark
  • Bottlenose Dolphin
  • Greater Barracuda
ThreatsCommercial bycatch, coastal habitat degradation, and sudden cold-stun events
HabitatsCoastal bays, coral and rocky reefs, open pelagic waters, lagoons, and estuaries
Life span15–19 years
Classification
  1. OrderPerciformes
  2. FamilyCarangidae
  3. GenusCaranx
  4. SpeciesCaranx hippos
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Safe to observe at a normal distance.
Responsible observation
  • Look for blitzes: Watch for churning foam and diving seabirds, which indicate a pack of feeding jacks.
  • Observe from boats: Maintain distance around diving flocks to avoid spooking schools back down into the depths.
  • Handle with care: If landed by line, avoid the sharp scutes near the base of the tail.
Related species
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