There a lot of them, but some of the ones I can think of are:
Horse (perhaps those two fall into the same category?)
Is it because someone tried them and they taste bad? Because we regard them as cute? Because some people have them as pets? (That one really makes no sense to me because I’ve been owning hundreds of tropical fish since I was eight and fish is still my favorite food.) I don’t really want to eat bat, but if people had been eating bats since the dawn of time, I’m sure I would think nothing of it. Why are cow, chicken, pig, and the more common types of tropical fish thought of as the meat that we all eat?
And what’s scrod?