Yellowfin tuna

The yellowfin tuna (Thunnus albacares) is a species of tuna found in tropical and subtropical oceans worldwide. It is among the larger tuna species, reaching weights over 180 kg. However, it is smaller than the Atlantic and Pacific bluefin tunas, which can reach over 450 kg. The anal fin, the second dorsal fin, and the finlets between those fins and tail are bright yellow, hence it's name. The main body is dark metallic blue, changing to silver on the belly. Unlike most fish, tuna are warm-blooded. Their warm body temperature, elevated metabolism, cardiovascular system, and a well-developed lymphatic system are all involved in their ability to engage rapid bursts during long periods of swimming.