A fan of fungus?

This morning I asked the Concepts of Nature class, "Why do we have football teams named for rams, bulls, and bears but not, for instance, fungus?"

Let's face it: fungus is a powerful force, adaptable to a variety of environments and almost impossible to destroy. Just try to eradicate athlete's foot fungus from a locker room! And there's a huge fungus growing in our yard that's as hard and stubborn and immoveable as a linebacker: running into it with the weed-eater or mower is a traumatic experience.

Why does such a potent force fail to be adopted as a symbol of pure masculine force, as bears, bulls, and rams have been? Give me a team called the Fungus and I'll cheer 'em on!