A dolphin is thought to be the only one to have carried out more than 50 attacks on humans in recent years in a coastal city in Japan.
Since July 21, there have been 18 dolphin attacks on swimmers. Experts believe that all these attacks were made by the same male dolphin. And according to them, the reason is that the dolphin is lonely.
This dolphin is believed to be a bottlenose dolphin, which makes it unusual to attack humans, as they are usually known to be close to humans.
According to researcher Tadamichi Morisaka, it is unusual for bottlenose dolphins to approach humans, let alone bite or attack them.
However, Morisaka thinks that this dolphin has been used to interacting with humans for years now. And maybe his attacks aren't really like that.
This dolphin's bites to humans seem to be more playful than attacks.
But because dolphins have very sharp teeth, a small bite on humans can cause injuries.