I recall having whale on a regular basis when I was college in Japan in 1968-69. I liked it, though its grey appearance wasn't appealing. I was always struck by how much it resembled meat in both texture and taste.
Mollusc is a perfectly legal way of writing mollusk if that's what you mean. And everyone knows that whales evolved from hungry beach snails around 50mya.
Was it good? It was OK. Would I have it again? Probably not.
Still a nice experience. Also trying cured reindeer, moose and seal slices was pretty unique.