[SAI_Peregrinus]

Catholics don't consider fish meat. I'm not sure what they think it is, maybe some sort of creepily mobile mushroom?

[hnzix]

And some Buddhist and Hindu sects consider mushrooms to be meat.

[CuriouslyC]

Ironically enough, fungi and animals separated later in the tree of life than plants. So, while certainly not correct, there is a kernel of truth there.

[pattisapu]

Not as meat. For some Hindus anyway mushrooms and leeks are prohibited just like meat.