Tunas are large, fast-swimming fish belonging to the family Scombridae. They are known for their streamlined bodies and powerful tails, which allow them to swim at high speeds. Tunas are found in warm seas around the world and are popular among both commercial and recreational fishermen. There are several species of tuna, including bluefin tuna, yellowfin tuna, and albacore tuna. These fish are highly valued for their meat, which is often used in sushi and sashimi. Tunas play an important role in marine ecosystems and are also a key species in global fisheries.