Yellowfin tuna (Thunnus albacares) is an oceanic pelagic species, which, like the mahi-mahi, enjoys waters with high concentrations of dissolved oxygen. It can regulate its temperature and spawns in summer.
Are torpedo-shaped with dark metallic blue backs, yellow sides, and a silver belly. They have very long anal and dorsal fins and finlets that are bright yellow. Yellowfin can live up to six or seven years. They are highly migratory and are found throughout the Pacific, Atlantic and Indian Oceans. They form schools with other tunas like skipjack and bigeye, and are also known to associate with dolphins.
The yellowfin tuna is one of the open ocean’s fastest, strongest predators and an important fishery species everywhere that it lives. Reaching weights of at least 400 pounds (~190 kg) and lengths of nearly 7 feet (~2 m), the yellowfin tuna is a large species that will eat just about anything that it can swallow. A one year old yellowfin tuna weighs 8 – 10 lb, two year olds are about 35 lb, three about 75, a four year old averages 130, they live up to eight years. They can swim up to 50 mph. Within two years, individuals reach lengths of 3 feet (~ one meter) and are sexually mature.
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