Offshore pelagic · Saltwater
Greater amberjack
Seriola dumerili
Circumglobal in subtropical and warm-temperate seas; in the western Atlantic ranges from Nova Scotia to Brazil, including the Gulf of Mexico and the Caribbean.
Also called amberjack.
- Nearshore
- Offshore
- Regulated context
- 4 of 4 overlays reviewed
- Reviewed 2026-08-27
Before you target this fish
Regulated context — check the rules for the exact water
Where this applies US Gulf of Mexico and South Atlantic federal waters; state-water rules can differ.
The reviewed context, unedited
Two separate US stocks with different status. The Gulf of Mexico stock is overfished (2021 assessment) and is currently under a full recreational harvest closure (zero bag/possession limit) driven by an annual-catch-limit overage and rebuilding-plan accountability measures, with recovery targeted by 2028. The South Atlantic stock is not overfished and not subject to overfishing (2020 assessment, SEDAR 59) and carries a recreational minimum size (28 in fork length), a small bag limit, and an April closure. Season length, bag limits, and even whether the season is open at all change year to year based on quota accounting — verify current status and season with NOAA Fisheries, the Gulf of Mexico Fishery Management Council, and the South Atlantic Fishery Management Council before targeting.
Rules for this fish change at a state line and sometimes inside one. Check the ones that apply to the exact water you are standing on before you act on anything here — this record is biology, not permission.
Take this somewhere
This page is the record. The reading is what happens when you add water, a season and a temperature to it — that is where the families below get ranked against each other instead of just listed.
Those three links carry the fish and nothing else. No conditions were declared on this page, so none travel, and the link says so rather than sending an empty reading.
The half nobody publishes
What this record does not know
Everything else on this page comes from a named agency or peer-reviewed source. This is the other side of that: the questions a reviewer went looking for an answer to and came back without, and the fields the record leaves empty because filling them would mean guessing.
It is here rather than at the bottom because a page that only shows what it knows is easy to read as a page that knows everything. For Greater amberjack there are 16 of them.
Named by a reviewer
10Somebody looked for this and wrote down that they did not find it.
- Behaviour
Diel activity pattern (crepuscular/diurnal/nocturnal) not found in an acceptable source; classified here as mixed by default rather than sourced.
Cold-front, angling-pressure, and water-clarity response not found.
Current-facing and tide-specific behavior not sourced.
- Identification
No sourced thermal preference or distribution temperature range for greater amberjack in the wild — only depth range and a subtropical/warm-temperate latitude band were found; aquaculture growth-temperature studies exist but are not a wild preference or distribution figure.
No sourced population-average length — only typical angling weight and maximum size were found.
Lesser amberjack (Seriola fasciata) field distinction not confirmed against an acceptable source.
Sexual dimorphism beyond size-at-age (females larger and longer-lived) not detailed further.
- Forage
Seasonal diet emphasis and a full ontogenetic prey-size shift beyond the juvenile/adult split were not found in an acceptable source.
- Season
Season-by-season depth and behavior shift beyond the general depth range was not found in an acceptable source; entries largely repeat the year-round structure-use pattern, hence status: partial.
Because harvest status (open/closed, bag limit) changes yearly and by stock based on quota accounting, this calendar cannot and does not encode a current fishing season — verify separately with NOAA Fisheries and the relevant council.
Absent from the record
6No reviewer wrote a gap here. The field is simply empty, which is its own answer.
- Water temperature
No agency or peer-reviewed temperature band for Greater amberjack was found that a review would accept. The reading runs without one rather than borrowing a number from a related fish.
- Positioning
How this fish uses moving water is not resolved from a source, so the reading does not weight current or tide for it.
No sourced account of light or time-of-day behaviour. Light stays a declared condition rather than a prediction.
- Identification
No reviewed image. A photograph is only in this catalog when an agency or a named creator labelled the subject, and nobody has cleared one for this species yet.
- Presentation
No species-specific weighting rule is reviewed for Greater amberjack. Its ranking comes from the shared model — season, temperature, water type, holding and forage — with nothing added for this fish in particular.
- Population context
No regional population profile is registered. The species-level reading stands on its own; it does not silently become a local one.
Where the record puts it
Water and range
Nearshore
3 reviewed holding classes- Nearshore reef
- Wreck
- Rock pile
Offshore
2 reviewed holding classes- Deep wreck
- Offshore ledge
DepthJuveniles school pelagically around drifting Sargassum mats in open water for roughly their first 5–6 months; after that, subadults and adults hold near reefs, rocky outcrops, and wrecks at roughly 60–240 ft (18–72 m), with a documented depth range extending past 1,000 ft.
How this fish uses current or tide is not resolved from a source. The reading leaves that axis alone rather than filling it in from a relative.
No sourced account of how light or time of day changes its behaviour.
Thermal band
Temperature
No reviewed temperature band
Nobody publishes a preferred or active temperature range for Greater amberjack that a review would accept. Borrowing one from a related fish would look like knowledge and behave like a guess, so the reading runs without it and says which parts of the answer that weakens.
How it uses water
Behaviour
Adult aggregation around a wreck or reef is a structure response, not a schooling behavior in the open-water sense.
Adults take crabs, squid, and other reef-associated fishes around structure; juveniles feed on zooplankton, including crustacean larvae, in the pelagic Sargassum community.
Diel activity pattern was not directly sourced for wild fish; classified as mixed pending a source-backed determination rather than left blank, since the field is required.
CoverStructure-oriented as adults — reefs, rocky outcrops, and shipwrecks; juveniles use pelagic Sargassum as cover in open water.
Open waterJuveniles are pelagic, schooling around drifting Sargassum mats before transitioning to demersal, structure-oriented habitat around 5–6 months of age.
TerritoryAdults hold on specific reef, rock, or wreck structure rather than ranging widely in open water; not documented as aggressively territorial in sourced material.
Spawning (conservation context)Broadcast spawner; adults congregate on reef and wreck structure to spawn, with a spawning peak in spring reported for Gulf and South Atlantic populations, and a single female releasing tens of millions of eggs across a season. This record excludes aggregation sites and precise timing; spawning is conservation context, related to why Gulf harvest is currently restricted under a rebuilding plan, and is not a targeting cue.
Where the general rule stops
- The Gulf of Mexico stock is currently under a full recreational harvest closure driven by rebuilding-plan accountability measures; treat any presentation guidance below as biology, not as license to target amberjack in a closed jurisdiction. Verify current Gulf and South Atlantic rules before fishing.
What it can eat
Forage
- Larger prey fish
- Crustaceans
- Mollusks
- Zooplankton
Adults are opportunistic structure-associated predators taking crabs, squid, and other fishes around reefs and wrecks; juveniles feed on zooplankton, including crustacean larvae, while pelagic around Sargassum. Diet capacity is not evidence of a current bait event.
- Feeding style
- Opportunistic
- Feeding zone
- Mixed
By life stage
- Young of year
- Zooplankton, crustacean larvae, and other small invertebrates in the pelagic Sargassum community.
- Adult
- Crabs, squid, and reef-associated fishes.
Diet capacity described here is not proof of a current feeding event; what greater amberjack are actually eating on a given day still has to come from direct observation.
Through the year
Season
Spring
- Where they sit
- Nearshore and offshore reef, rock, and wreck structure for adults.
What that changesStructure vertical and bottom contact on nearshore structure; deep drop and vertical jig on deeper offshore structure.
What would count against it
- using the spawning window as a location or timing cue
Reported spawning peak (March–June per NOAA); aggregation sites and precise timing are excluded from this record. This window also overlaps with scheduled regulatory closures in both management areas — a regulatory fact, not a fishing recommendation.
Summer
- Where they sit
- Same nearshore/offshore structure classes.
What that changesStructure vertical and vertical jig on nearshore structure; deep drop and trolling on offshore structure.
What would count against it
- assuming a fixed calendar season without checking the current year's quota-driven closures
Fall
- Where they sit
- Nearshore and offshore reef, rock, and wreck structure.
What that changesStructure vertical and bottom contact nearshore; vertical jig and deep drop offshore.
Winter
- Where they sit
- Nearshore and offshore structure, likely deeper as water cools; not directly sourced by season.
What that changesDeep drop and vertical jig on offshore structure.
Spawning · Spring, Early summer
Broadcast spawner that congregates on reef and shipwreck structure to spawn, peaking in spring in Gulf/South Atlantic populations; a single female can release tens of millions of eggs across a season. Site- and timing-specific aggregation detail is excluded here as conservation context only.
Recorded as conservation context. No spawning site, staging concentration or migration bottleneck is named anywhere in this catalog, because naming one is how a population gets fished out.
Telling it apart
Identification
What to look at
- Dark amber-brown stripe runs from the nose through the eye to the front of the first dorsal fin, becoming more pronounced when the fish is excited or feeding.
- First dorsal fin has 7 spines, versus 8 in banded rudderfish.
- Upper jaw bone curves upward toward the eye.
- An amber horizontal stripe runs along the mid-body in some fish, giving the species its common name.
- Juveniles show 5–6 dark vertical bars on a yellowish body.
- Average adult length
- Not separately sourced from typical angling weight; see commonAnglingSize.
- Common angling size
- Most commonly landed around 40 lb.
- Typical weight
- Most commonly up to about 40 lb.
- Maximum documented
- Up to about 6 ft and occasionally over 200 lb; females reach larger sizes and greater longevity than males.
- Longevity
- Documented to about 17 years; matures at 3–4 years of age.
What it gets confused with
- Banded rudderfish (Seriola zonata)
- Banded rudderfish lacks greater amberjack's dark eye stripe, shows a bluish sheen with a white-tipped tail and first dorsal fin, and has 8 first-dorsal spines versus amberjack's 7.
- Almaco jack (Seriola rivoliana)
- Almaco jack shares the dark eye stripe but has a notably rounder body and elongated soft dorsal rays more than double the length of the rest of that fin; greater amberjack's dorsal fin is more uniform in height.
What follows from all of that
Presentation families
Nearshore
Structure vertical
Hold a presentation in the water column directly over hard structure and stay there as the boat moves.
- stay vertical
- hold the depth band
- short lifts
- reset when the line angles
What it asks of the tackle
- Depth control
- High
- Sensitivity
- High
- Casting distance
- None
- Weight range
- 2–16 oz
- Cover resistance
- High
- Line visibility
- Secondary
- Retie frequency
- High
Bottom contact
Keep a bait on or just above the substrate along a break, flat, or inside a weed edge.
- feel bottom
- drag or hop
- pause on the break
- stay in contact
What it asks of the tackle
- Depth control
- High
- Sensitivity
- High
- Casting distance
- Moderate
- Weight range
- 1/8–1/2 oz
- Cover resistance
- High
- Line visibility
- Low
- Retie frequency
- High
Vertical jig
Work a compact bait up and down through a marked depth, basin, or timber pocket.
- stay over the target
- measured lift
- controlled drop
- watch slack
What it asks of the tackle
- Depth control
- High
- Sensitivity
- High
- Casting distance
- Vertical
- Weight range
- 1/8–3/4 oz
- Cover resistance
- Moderate
- Line visibility
- Low
- Retie frequency
- Moderate
Offshore
Deep drop
Put bait on the bottom in water deep enough that the drop itself is most of the work.
- heavy enough to go straight down
- know when you are down
- short lift to check
- wind steadily
What it asks of the tackle
- Depth control
- High
- Sensitivity
- Low
- Casting distance
- None
- Weight range
- 8–48 oz
- Cover resistance
- Moderate
- Line visibility
- Secondary
- Retie frequency
- Moderate
Vertical jig
Work a compact bait up and down through a marked depth, basin, or timber pocket.
- stay over the target
- measured lift
- controlled drop
- watch slack
What it asks of the tackle
- Depth control
- High
- Sensitivity
- High
- Casting distance
- Vertical
- Weight range
- 1/8–3/4 oz
- Cover resistance
- Moderate
- Line visibility
- Low
- Retie frequency
- Moderate
Trolling
Cover a depth contour or basin at a controlled speed to intercept mobile fish.
- speed control
- depth control
- follow the contour
- turn to change action
What it asks of the tackle
- Depth control
- High
- Sensitivity
- Low
- Casting distance
- Boat
- Weight range
- Varies with speed and depth
- Cover resistance
- Low
- Line visibility
- Moderate
- Retie frequency
- Low
What moves them for this fish
No species-specific rule is reviewed for Greater amberjack. Its ranking comes from the shared model — season, temperature, water type, holding water, forage — with nothing added for this fish in particular. That is a gap, not a claim that nothing is special about it.
Where every sentence came from
Sources
Agency
Gulf of Mexico Fishery Management Council — Greater amberjack season length and closure announcements
Used for habitat, thermal band and presentation families; behaviour; season. Read 2026-08-30, next check 2026-11-27.
Agency
NOAA Fisheries — Greater Amberjack species overview
Used for identification; behaviour; forage. Read 2026-08-30, next check 2026-11-25.
Agency
NOAA Fisheries — Greater Amberjack species overview and stock status
Used for habitat, thermal band and presentation families; season. Read 2026-08-30, next check 2026-11-27.
Agency
Federal Register — 2025–2026 recreational closure for Gulf greater amberjack
Used for habitat, thermal band and presentation families. Read 2026-08-27, next check 2026-11-27.
Agency
South Atlantic Fishery Management Council — Snapper Grouper Amendment 49 (greater amberjack catch levels and management measures)
Used for habitat, thermal band and presentation families. Read 2026-08-27, next check 2026-11-27.
Agency
Gulf of Mexico Fishery Management Council — jack species identification guide
Used for identification. Read 2026-08-30, next check 2026-11-25.
Agency
South Atlantic Fishery Management Council — Snapper Grouper Amendment 49
Used for season. Read 2026-08-30, next check 2026-11-25.
A source with no link predates the rule that one has to carry a URL. It is still a real citation and still checkable; it just takes a search rather than a click, and that is worth knowing before you rely on it.