Mormyrus tapirus Pappenheim 1905, an Elephantfish sometimes called "the Freshwater Dolphin". West Africa; basins of Guinea and Cameroon. To seventeen inches in length. One of the few of the two hundred plus species of mormyrids used in the aquarium interest.
if so, then yes, but they aren't easy to keep, sensitive to water parameters
the freshwater dolphin that i heard of are real dolphins that live in the amazon river and is pink because of the food they eat. and no, they won't be happy living in an aquarium.