Tuna is classified as a salt water fish and it is from the family of â€œScombridaeâ€ which is part of the genus â€œThunnusâ€. Tuna has white flesh and the coloration of the muscle tissue ranged from light pink to dark red. This red color comes from the myoglobin which is a molecule that binds with oxygen in the bloodstream.
Tuna is largely fished all over the world because there is so much of it and it is considered to be one of the most popular types of seafood for people to eat. There are of course different varieties of tuna such as bluefin tina and yellowfin. There are many different nutritional/health benefits to eating tuna on a regular basis, including all of the omega-3 fats and protein it contains.