When I ask them, they usually have heard of goldfish but not koi. Asian Americans are more likely to know what carp/koi are.
That's a weird one to me, virtually all the local pet stores carry koi on the regular, and there's a few places with koi ponds. Carp are definitely less well known, but I've never observed koi to be anywhere near the level of unknown you're describing.
I was about to say, in my experience most people know what Koi are. Maybe it's a city thing, since as mentioned people in cities like NYC are less likely to have access to Koi. I don't think I've ever met anyone who didn't know what Koi were, though to be fair I don't know how often Koi come up in my day-to-day conversations with most people
At Shedd Aquarium and St. Louis Zoo, kids automatically thought the Lesser Sirens were axolotls, probably because of Minecraft spreading awareness of that species. The same goes for the mudpuppy at Peggy Notebaert Nature Museum.
The lake association that maintains the series of lakes in Maine my fiancé's family visits every year always has one or two tanks with mudpuppies in their HQ building. They're an introduced species, which the signage discusses, but people like seeing them. Just the other day I heard someone say how they've always wanted to see a mudpuppy, and then proceeded to call the animal an Axolotl when they actually saw it...
~Thylo
