[pavel_lishin]

It also reminds me of a bit in Unsong, a book where there's quite a bit of discussion about whether the whale is a fish or not.

[bloak]

There's a chapter in Moby-Dick with a similar discussion.

[klipt]

Whales, like us, are descended from lobe finned fish, so they are as much fish as we are.

[IAmBroom]

Nope.

But geese are.

[goopypoop]

That's just silly.

Geese are molluscs.