You can find canned longfin tuna (albacore), yellowfin tuna, skipjack tuna and bigeye tuna, among other kinds. High-end canned tuna is often longfin tuna, which is characteristically whitish in color.

Oily fish is defined as fish with a proportion of fat higher than 5-6% of their muscle mass: sardines, longfin tuna, mackerel and horse mackerel are some the most well known examples. Oily fish ...