NOAA describes adults around 4 feet 11 inches and 130 pounds, with much larger maximum records.
Southern California field dossier
Pacific Bluefin Tuna
Thunnus orientalis
- Bluefin tuna
- bluefin
- Pacific bluefin
A large, highly migratory open-ocean predator. The short pectoral fin, dark back, silver-spotted belly, and yellow finlets separate it from the other tunas encountered off Southern California.
Sources reviewed 2026-07-286 source records
Photo coverage stateVerified photograph pending rights review. NOAA publishes credited images, but this beta does not reproduce them until reuse rights are recorded.
- Short pectoralThe tip does not reach the front of the second dorsal fin.
- Yellow finletsSmall yellow fins edged in black run toward the tail.
- Small eyeRelatively small compared with other tuna species.
Verify current regulations before every tripSnapshot checked 2026-07-28. Follow the official links below for live rules, protected areas, licenses, and any in-season changes.
At a glance
Every factual card carries provenance
Squid and fishes including sardines, anchovies, saury, herring, mackerel, hake, and other tunas.
Southern California and northern Baja are the primary West Coast recreational grounds.
CDFW lists tunas open year-round but directs anglers to the complete ocean rules for bag, possession, and fillet requirements.
Field dossier
Beginner-readable, source-deep
Pectoral, eye, finlets
Identification & look-alikes
Pacific bluefin have a dark blue to black back with gray-green iridescence, a belly marked by silver or gray spots or bands, and small yellow finlets edged in black.
The pectoral-fin tip does not reach the front of the second dorsal fin, and the eye is relatively small compared with other tuna species.
Other tunas can share the same streamlined shape. Confirm pectoral length, eye size, body markings, and finlets before retention.
- Practical inference
- NOAA Fisheries
- CDFW
A genuinely large pelagic
Typical size
NOAA describes adults at about 1.5 meters (4 feet 11 inches) and 60 kilograms (130 pounds).
The maximum reported by NOAA is 3 meters (9.8 feet) and 450 kilograms (990 pounds).
Fish and squid dominate
Diet & prey
NOAA lists squid and fishes such as sardines, anchovies, saury, herring, pompanos, mackerel, hake, and other tunas.
Red crabs and krill also appear in the NOAA diet summary.
Built to cross an ocean
Behavior
Pacific bluefin are highly migratory. NOAA tagging summaries show some fish remain in the western Pacific while others cross to the eastern Pacific.
NOAA reports maturity near age five, an average life span near 15 years, and a maximum age up to 26 years.
Open water over fixed structure
Habitat, structure, depth & range
Pacific bluefin travel throughout the Pacific and occupy mostly temperate water, with use of tropical and cooler coastal regions as well.
NOAA reports most U.S. catch within about 100 nautical miles of the California coast and primary recreational grounds off Southern California and northern Baja.
NOAA's West Coast essential-fish-habitat record places the species mainly beyond the 12-meter depth contour, but the guide does not publish a fixed target depth for this mobile pelagic fish.
- Coverage note
- NOAA Fisheries
Availability moves
Seasonal pattern & water
NOAA characterizes Pacific bluefin as primarily a temperate-ocean species, while also noting tropical and cooler coastal use.
NOAA reports year-round U.S. market availability with most U.S. West Coast commercial catch between May and October. That is fishery context, not a recreational bite forecast.
Follow forage, not folklore
When & how they feed
They are active predators on schooling fishes, squid, and occasional crustaceans.
The reviewed NOAA species sources do not establish one dependable daily feeding window, so the guide does not publish an unsupported time-of-day rule.
- Coverage note
- NOAA Fisheries
Crew-ready, fish-ready
Techniques, tackle & beginner setup
NOAA lists live sardines or anchovies, casting jigs, and trolling jigs for the Southern California and northern Baja recreational fishery.
Start with a qualified operator and use the boat's recommended rig. Match the presentation to the documented live-bait or jig methods rather than bringing one fixed setup.
- Practical inference
- NOAA Fisheries
Use tackle strong enough for the intended size class so the fight does not unnecessarily exhaust a fish that may be released.
Plan the release before the bite
Handling & conservation
Use tackle strong enough to land the fish without an exhausting fight, and keep a dehooker or suitable release tool ready.
If releasing, dehook in the water when possible. Never gaff a fish you plan to release, keep air exposure brief, wet your hands, avoid eyes and gills, and support the body rather than hanging the fish by its mouth.
Face a sluggish fish into the current until it can swim away under its own power.
NOAA reports that the 2024 assessment found Pacific bluefin not overfished and not subject to overfishing, after the stock was determined rebuilt in 2024.
Snapshot checked 2026-07-28
California regulations
CDFW's July 1, 2026 Southern Region page lists tunas open year-round and explicitly directs anglers to the complete California ocean sport fishing regulations for bag limits, possession limits, vessel fillet procedures, and other requirements.
This beta intentionally does not freeze a tuna bag-limit number into the dossier when CDFW's current regional summary directs anglers to the complete rule set.
- Coverage note
- CDFW
Current general ocean rules include special individual-bagging and identification requirements for tuna fillets south of Point Conception.
From species to a trip plan
No inferred targeting
Recent verified countsOpen the live count view. Missing source reports remain labeled, never converted to zero.
Live source states →Open tripsBrowse verified schedule inventory. Current beta inventory does not claim that a trip targets this species.
Targeting not yet verified →Landing sourcesInspect official count and schedule sources by Southern California landing.
Source directory →Boats reporting tripsSee boats present in verified schedule feeds. Species targeting is shown only when a source proves it.
Honest coverage →Citation & provenance ledger
6 sources used in this dossier
- Pacific Bluefin Tuna species profileNOAA FisheriesOfficial NOAA appearance, biology, range, habitat, stock, fishery, and recreational-method summary. NOAA states the page was updated July 2, 2026. Reviewed 2026-07-28.
- Southern Region ocean regulationsCalifornia Department of Fish and WildlifeOfficial current Southern Region season, size, bag, and possession summary. The page states it was updated July 1, 2026. Reviewed 2026-07-28.
- Ocean Sport Fishing hubCalifornia Department of Fish and WildlifeOfficial entry point for licenses, identification, current regulations, marine protected areas, advisories, and release guidance. Reviewed 2026-07-28.
- Pacific bluefin tuna essential fish habitatNOAA FisheriesOfficial West Coast essential-fish-habitat record for depth context and California Current feeding habitat. Reviewed 2026-07-28.
- Catch and release fishing best practicesNOAA FisheriesOfficial handling and release guidance. NOAA states the page was updated September 3, 2025. Reviewed 2026-07-28.
- General ocean fishing regulationsCalifornia Department of Fish and WildlifeOfficial general limits, boat limits, gear rules, and fillet requirements. The page states it was updated July 24, 2026. Reviewed 2026-07-28.
Continue learning
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