Recently my husband and I dined at a somewhat high-end restaurant and had an ahi tuna steak for an entree. My husband didn't like it, only had half of it, and we brought the leftovers home. My husband now suspects it wasn't ahi tuna but some other fish. I'm wondering, is there any way for us to have that piece of fish tested? Or is that a crazy-expensive ordeal that's just not worth it? I'm not really hung up on this, but I am curious. It would be nice to prove whether the restaurant mis-labeled the fish or not.