The Atlantic bluefin tuna is the largest member of the Scombridae Family (albacores, bonitos, mackerels, tunas). It is one of the largest bony fishes and can reach lengths of up to 3 m, although they are more commonly found from 0.5-2 m in length. Adult weights range from 136-680 kg, although the upper weight range is rare, especially now. They can dive as deep as 914 m, and are known to swim long distances as they are a highly migratory species.
Atlantic bluefins are dark blue to black near the dorsal surface and silvery near the ventral surface. The bluefin is known for the finlets that run down their dorsal and ventral sides toward the anal fin. There are 12-14 spines in the first dorsal fin and 13-15 rays in the second dorsal fin. The anal fin has 11-15 rays. The average lifespan of bluefin tuna is 15-30 years.
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