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A further two people have been bitten by a dolphin in a string of attacks in Japan.
The man, who was said to be in his 40s, was bitten on both of his arms by the creature on the morning of 11 August in the beach which borders the Sea of Japan.
This was reported to be followed by a second attack by a dolphin the same day on another man, reported to be also in his 40s, who sustained injuries to his fingers on his left hand.
Authorities in the area believe that the same dolphin is behind the attacks, as well as a further six related attacks so far this summer.
Dolphins are not typically aggressive towards humans.
Japanese authorities have since installed ultrasonic transmitters by the popular beach in a bid to deter dolphins from the site with their high-frequency sounds.
Those heading to the beach have now been warned of the risks associated with dolphins, and have been told to avoid approaching any in the water.
It is not currently clear what species of dolphin was involved in the attacks.
However, local media in the area have reported that the dolphins in the area have become accustomed to interaction with humans, and have been spotted in extremely shallow waters at the beach, including waters which are just knee-deep.
Elsewhere in recent sea creature attacks, a group of orcas which attacked a sailboat off the coast of Portugal attacked another the same day.
Sailors who took to the seas from the coast of Portugal and Spain found on 31 July that their boat was attacked by the whales.
The first boat attacked was minding its own business, near the coast of Sines, when the orcas drew closer.
Clearly not liking the boat, the whales damaged it so badly that it started to sink and the five members of the crew on board had to be rescued.
Luckily no one was hurt and a lifeboat escorted the sea-dwellers back to shore.
The same group of killer whales set their sights on another boat, heading from Lisbon to the Algarve, according to the Correio da Manhã.
This vessel was a fair bit smaller, carrying just two sleeping passengers when the orcas bit the boat until it broke.
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