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Photo of a Almaco Jack

Species profile

Almaco Jack

Seriola rivoliana

Bony fishIUCN: Least Concern629 iNat observations

Identify Almaco Jack (Seriola rivoliana) from a photo: try it free in your browser, or get unlimited IDs, no sign-up, with the CatchRules app. Plus current fishing rules across 3 jurisdictions.

At a glance

Almaco Jack (Seriola rivoliana) is an IUCN Least Concern bony-fish species regulated in 4 of 66 jurisdictions tracked by CatchRules across the U.S. and Canada.

The strictest bag limit is 1 (Georgia); the most generous is 20 (Federal Waters (NOAA)).

Across 3 jurisdictions with stated minimum sizes, the average minimum is 29.0 in (≈ 2 ft 5 in).

Confirmed by 42 research-grade iNaturalist observations, with Florida, Texas, and Hawaii the top jurisdictions by observation count.

Notable details

  • Found in tropical and subtropical waters worldwide, making it one of the most wide-ranging jacks.
  • Can reach 90 cm (35 inches) and grows rapidly — a species increasingly farmed in marine aquaculture.
  • Known as 'kahala' in Hawaii, where it is a traditional food fish eaten with care due to ciguatera risk.
  • Its elongated second dorsal and anal fin lobes are the easiest way to distinguish it from other amberjacks.
  • An aggressive open-water predator that herds and chases baitfish to the surface.

Background

Almaco jack (Seriola rivoliana) is a game fish of the family Carangidae; they are in the same family as yellowtail and amberjack. They feed, both day and night, on other smaller fish such as baitfish and small squid. The flesh is thick and dense like tuna and can easily pass for white albacore if prepared as sushi.

Background excerpt adapted from Wikipedia's Almaco Jack article (CC BY-SA). Visit Wikipedia for the full entry.

Frequently asked questions

What is Almaco Jack?

Almaco Jack (Seriola rivoliana) is an IUCN Least Concern bony-fish species regulated in 4 of 66 jurisdictions tracked by CatchRules across the U.S. and Canada.

What is the scientific name for Almaco Jack?

Almaco Jack is Seriola rivoliana.

Is Almaco Jack regulated for fishing?

Yes — Almaco Jack has fishing regulations in 3 U.S. states and/or Canadian provinces tracked by CatchRules. See the "Jurisdictions with rules" section above for the binding-source links.

How can I identify Almaco Jack?

Take a photo with the free CatchRules app for iPhone or Android — on-device identification recognizes Almaco Jack along with ~1,500 other species. No sign-up, unlimited use.

Photo credit: iNaturalist / Wikipedia. Identification reference only — verify regulations with the issuing wildlife agency before retaining a catch.