👉 Blackfin, also known as a blackfin tuna or blackfin tuna, is a type of fish that is native to the Pacific Ocean and can be found in coastal waters around the world. It is typically large and has a white body with dark stripes on its belly, fins, and eyes. Blackfins are known for their high fat content, which makes them an excellent source of omega-3 fatty acids. They are also considered to be highly nutritious and have been shown to improve heart health