Bigeye

The bigeye tuna, so called for its oversized eyes, swims deeper than any other tuna species, frequently visiting deep canyons and peaks, 800 feet (243 meters) or deeper. Satellite imagery has recorded the bigeye spending prolonged periods deep below the surface during the day, making occasional dives as deep as 1,640 feet (500 meters).

They are native to tropical and temperate oceans from Chile, Ecuador, and Peru to the Canary Islands, Hawaii, and New England. The bigeye tuna lives longer than its cousin, the yellowfin, with a life span of 10 to 12 years. They reach sexual maturity at the age of four. They, like most tuna, are overfished and therefore ranked as vulnerable on the conservation status list.