Proaquapithecus

Proaquapithecus is an extinct amphibious mammal part of the hominid ape family that was found in what is now Madagascar and East Africa from the mid-to-late Pliocene. The leg bones of this primate suggests a transitional form between the legs of its ancestors and its modern descendant, with the lower legs possibly not being completely fused as its modern descendant. Proaquapithecus was most likely carnivorous, so it may have fed on fish, squid, crustaceans, and mollusks. Based on modern mermaids, Proaquapithecus may have been social animals and may have befriended some marine mammals such as dolphins. Around 3-2 million years ago, the genus Proaquapithecus disappeared but have also evolved into modern mermaids.