Lone Joker Dolphin Found in the Baltic Sea

A lone joker dolphin has been found in the Baltic Sea: it laughs and talks to itself. Scientists were surprised as dolphins usually live in pods, but this one (named Delli) settled alone. Moreover, it made too many sounds as if it was communicating with someone. Later, scientists realized it is autistic and makes loud noises from emotional bursts - it talks to itself to keep from going mad.