Other names: ʻahi
The bigeye tuna, Thunnus obesus, is a large, migratory fish found in tropical and subtropical oceans worldwide. Known for its robust body and large eyes, it is highly valued in commercial fisheries, especially for sashimi. This species is popular among sport fishers for its size and strength.
Other names
ʻahi
Length
~180" (max 250)
Weight
~120" (max 180)
Water
Salt
Water Temp
13-29° F
Depth
300-500 ft
Herring
Mackerel
MulletAlways open
No
27"
Curved fork length
Gigging, snagging
Bigeye tuna inhabit deep, pelagic waters, often found in open oceans
They frequently prefer water near the thermocline
They feed on fish, squid, and crustaceans, foraging day and night
Juveniles form surface schools, while adults prefer deeper waters
Spawning occurs year-round in tropical waters
Females release eggs in open water, which are fertilized by males
Larvae drift with ocean currents before maturin
Adults exhibit seasonal migrations to specific spawning sites and are multiple spawners, spawning over several months
