It's worth asking the server what specific species of tuna is being prepared, if possible, and keep an eye out for bluefin tuna and yellowfin tuna from certain parts of the world. Also ...

Either the URL was mistyped or the page may no longer be available ...

Tuna is widely available, but can sometimes see a dip in availability due to the monsoon season and where the tuna has been landed. Various types of tuna – particularly yellowfin and skipjack ...