@birdsandbats The Dallas World Aquarium and Saint Louis Zoo are the only two I have seen them exhibited at. I believe the Abilene Zoo also keeps them but I have no idea if they are exhibited there. I'm sure more zoos keep this species by now.
@d1am0ndback Can confirm that Abilene Zoo keeps them as well. I'd never heard of this frog until that zoo, actually! Glad to hear about two other holders.