A lonely dolphin acting out of sexual frustration is believed to be the culprit behind a spate of attacks on swimmers in Japan this summer. Since July this year, 18 people have been hurt in dolphin attacks near the seaside town of Mihama, with some requiring dozens of stitches. Posters warning beachgoers of the menace feature an open-mouthed dolphin baring razor-like teeth.
It says the mammals “are known to be dangerous to humans” and warns people to get out of the water if they are seen nearby. Stressed by crowds of bathers Wild dolphins rarely attack humans but have been known to bite or pull people underwater if they feel threatened or harassed..