ingredient information
Fish Tuna
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Tuna are several species of ocean-dwelling fish in the family Scombridae. Tuna are fast swimmers and like most other fish species are cold-blooded. Unlike most ocean fish species, which have white flesh, the flesh of tuna is pink. This is because the tuna's blood has a higher oxygen carrying ability than other fish species. Some of the larger tuna species such as the bluefin tuna can raise their blood temperature above the water temperature with muscular activity. Though not really warm-blooded, this enables them to live in cooler waters and survive a wider range of circumstances. Mercury levels are oftentimes relatively high in tuna, as they sit higher in the food chain. Canned tuna is one of the richest and most convenient sources of Omega-3. With benefits ranging from protective and preventive qualities on overall cardiac health and improved eye and skin health, the omega-3 acids found in tuna are an essential component of a balanced diet. Fortunately, omega-3's are abundant in most types of seafood but especially in cold-water varieties like tuna, one of the most omega-3 rich fish species. en.wikipedia.org & www.tunafacts.com