Frog in one of the tanks looked like the one signed…
could be mislabelled of course but seems unlikely?
The mislabelling is a pretty universal one - basically, about six or seven years ago it was discovered that the entire captive population of "Phantasmal" Poison Frog had been misidentified and in fact represented Anthony's Poison Frog.
Unfortunately this has had two lasting aftereffects; firstly, a lot of places haven't updated their signage. Secondly, and more pertinently in this case, the vast majority of the photographs floating around online purporting to show Phantasmal Poison Frog actually show Anthony's Poison Frog.... which means that zoos using the incorrect name nonetheless use photographs of the taxon they do hold.