Overview
One of the fastest and most powerful ocean fish. Migratory pelagic predator of enormous commercial and sporting value.
Identification
Spindle-shaped bodyShort pectoral finsDark blue backSilvery bellyDark bands along sidesLarge eyesSmall scales
- Body
- Sturdy, spindle-shaped body with relatively short pectoral fins.
- Colouration
- Dark blue back with silvery belly, featuring dark bands along the body.
- Sexual dimorphism
- Absent/not very noticeable
- Growth
- Fast, particularly in early years with increases of several lbs annually.
Taxonomy
- Family
- Scombridae
- Order
- Scombriformes
- Class
- Actinopterygii
Related species
Thunnus maccoyiiThunnus thynnusThunnus albacaresThunnus obesusThunnus atlanticus
Habitat & distribution
- Environment
- open_sea, pelagic
- Preferred bottom
- pelagic
- Geographic distribution
- Primarily located in the Pacific Ocean, from the China Seas to California, through Japanese waters.
- Micro-habitat
- Prefers open, pelagic waters at great depths, often migrates following ocean currents.
Prefers open waters with ample space for migration and hunting.
Presence by sea area
Na Costa Ovest CentroPeak
Na Costa Ovest SudPeak
Na Baja CaliforniaPeak
As Mar Cinese EstPeak
As Giappone SudPeak
As Giappone NordPeak
As Mar GiapponePeak
Open Pacifico TempPeak
Diet
- Primary prey
- anchovies, sardines, mackerels
- Secondary prey
- squid, shrimps, plankton
- Occasional prey
- jellyfish, small cephalopods
- Feeding behaviour
- Opportunistic predator, hunts in groups often chasing schools of smaller pelagic fish.
- Natural predators
- sharks, orcas, swordfish
Diet adapts to the availability of nearby smaller pelagic fish.
Behaviour
- Activity
- diurnal
- Social behaviour
- large_schools
- Aggressiveness
- high
- Migration
- Undertakes lengthy trans-Pacific migrations between feeding and spawning areas.
- Seasonal behaviour
- Migrations are influenced by water temperatures and food availability.
- Juveniles
- Young tend to stay in shallower areas before joining adult schools.
- Adults
- Adults form large schools and migrate in search of food and spawning areas.
Reproduction
- Spawning season
- June, July, August
- Spawning depth
- between 30 and 60 meters
- Eggs
- Pelagic, small, transparent eggs, laid in masses.
- Larval stage
- Larvae are small and transparent, growing rapidly in the first months.
- Sexual maturity
- varies between 4 and 6 years
When to catch Pacific bluefin tuna
Activity calendar
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PeakGoodLowInactive
Activity by season
Best times
Dayalba, mattino
Night—
This species shows peak fishing activity in spring, summer and autumn, when the productivity index (FPI) reaches its highest values.
Fishing activity decreases in winter, when conditions are less favourable.
Ideal conditions
Atmospheric pressure
Low
Actively hunts on surface.
Medium
Regular mid-water activity.
High
Goes deeper.
Barometric trend
Rising
Goes deeper.
Stable
Feeds regularly.
Falling
Hunts aggressively on surface.
Water temperature
10°COptimal zone: 14-24°C27°C
Preferred tide: moving
Where to catch it
Best spots
pelagic watersdeep coastal areasnear schools of small fish
Bottom preference
Spot type
Fishing techniques
Recommended
trollingdriftingbig gamespinning
Other applicable
Trolling OceanicoLive BaitingDriftingDrifting LeggeroPoppingSpinning OffshoreSpinning PesanteTraina CostieraVertical Jigging
Recommended baits
live baitsquidsardinesmackerels
Baits by pressure
Low
Cedar plugMetal jig extra heavy (300g+)Popper grande (GT)Skirted trolling (Pusher/Chugger)Soft plastic grande (20-30cm)Stickbait lungo (pelagici)Feather jig
Medium
Goggle-eye vivoSardina vivaSgombro vivoTonnetto vivoAcciuga vivaEsca viva (generica)Pezzo di pesce
High
Cedar plugGoggle-eye vivoMetal jig extra heavy (300g+)
Catch & handling tips
- Fight
- Fights fiercely, with strong runs and deep dives.
- Handling
- Handle carefully using gloves to avoid injury to yourself and the fish.
- Release
- Ensure the fish is fully rehydrated before release.
Curiosities & culture
- Record catches
- One of the largest recorded Pacific bluefin tunas weighed over 1,000 lbs, caught off Japan's coast. In 2012, a 489-pounder sold at the Tokyo auction for a record $1.76 million, underlining its high commercial and sport value.
- In the kitchen
- Highly prized in Japanese cuisine, especially for high-quality sushi and sashimi.
- Cultural notes
- Considered a delicacy in many sushi and sashimi dishes.
- Historical notes
- Bluefin tuna fishing has a long history, vital to both local economies and the international fish industry.
