] There are seven different kinds of tuna that are
] typically offered as either canned or fresh tuna:
] albacore, bigeye, blackfin, bluefin, bonito, skipjack,
] and yellowfin. Of these, the three found most
] commonly in sushi bars are albacore, yellowfin and
] bluefin. Skipjack, while occasionally found in sushi bars,
] is more commonly touted by Charlie the Tuna as canned tuna.

Finally, an explanation that I can understand about the differences between canned tuna and the various kinds of sushi and sashimi tuna. :)