thanks lifter, never heard of that. i usually don't go to a fancy fish monger, just my local supermarkets, whole foods, and occasionally a specialty fish shop.
yep, with a lot of smaller fishes, it's best to throw away the belly dark meat. but tuna belly is prized, especially in the sushi world.
in nomine patri, et fili, et spiritus sancti.
Meh nom eh noh...doot dooooo do do do.