Any variety of shellfish: crab, lobster, scallops, shrimp.[:p]
Can’t stand anything with a “fishy” taste or smell: anchovies, sardines, lox, canned tuna, etc.[xx(]
I know I’m probably “missing out”, but even a nice grilled swordfish would never be my choice of entre if any variety of beef, pork, or fowl is available.
All that said, every now and then I crave a “Pittsburgh-style” fish sandwich every now and then.