Maybe we should not call an instance a mastodon, but try to get more specific than "some word for an extinct megafauna thing I'm not even sure what it looked like" (which is good as the name of a software still) and
"So which up-to-four-legged hairy creature that reminds us of an elephant are you on?"
"My fluffy animal with a trunk, I'm not sure how it's related to mammoths exactly, is a good place full of interesting conversation"