A diver has been bitten on the forearm by a shark in waters off Bruny Island, Tasmania.Tasmania Police said they received a report at about 9:10am today of an attack.Inspector Darren Latham said "the man was diving with two other people at a depth of eight metres and approximately 50 metres offshore from Coal Point, Adventure Bay, when he was bitten by what is believed to be a two-metre-long broadnose sevengill shark"."The man was able to return to shore and was assisted by fellow divers, who contacted emergency services about 9:10am.Police vessel Dauntless is patrolling the area, but there have been no further sightings of the shark at this stage, police said."While this appears to be an isolated incident, we are reminding anyone planning to swim or dive in the area to remain vigilant, follow local safety advice and be aware of their surroundings," Inspector Latham said.Anyone who sees a shark should report it to police on 131 444.If the sighting presents an immediate threat, call Triple Zero (000).