Swimmers have been warned to stay away from dolphins in Fukui Prefecture in the wake of attacks on people by what is possibly a single male Indo-Pacific bottlenose dolphin, a species that usually lives in warm waters.
Having installed ultrasonic transmitters on buoys off the coast to repel dolphins, beach officials warned visitors not to approach dolphins even if they look friendly.
On July 26, a beach house operator was seen urging people to watch out for dolphins at Koshino beach, located about 20 kilometers west of the Fukui City center. The shallow waters of the beach are popular with families. The 71-year-old man was telling swimmers to come out of the sea immediately if they saw a dolphin.