tuna

[natty23]

what part of the tuna do we get in a tin? whats the difference between a fresh tuna steak bought from the fish counter and a tin of tuna steak?

[woofgang]

the diff is the same as between frsh salmon and tinned salmon

[Gef]

One important difference is that fresh tuna still contains the omega 3 oils which are "good" for you; tinned tuna doesn't.

[brachiopod]

The best cuts of tuna tend to come from the belly.

There should be no difference between a fresh tuna steak and a tinned tuna steak in terms of where on the fish it is cut from, (and assuming it is not mis-described).

However, tinned tuna is effectively 'cooked' in the canning process.

Any smaller cuts, off-cuts and trimmings will, if canned, be described as 'chunks' or 'pieces' respectively.

The other influence on 'quality' is the difference between tuna species, (yellowfin, bluefin, skipjack, albacore, bonito etc.), where some are considered better than others and thus command a higher price. Though this is probably another answer in itself !