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Unusually large bluebottles are washing ashore on the Gold Coast ahead of summer, with scientists unsure how their venom compares with that of smaller species.
A large bluebottle that washed ashore on the Gold Coast. Bluebottles up to three times the usual size are washing ashore on the Gold Coast.
Lifeguards have reported relatively few stings: 20 across 39 patrolled beaches during the school holidays. Bluebottles up to three times larger than those typically seen in Queensland waters are washing ashore on the Gold Coast, but scientists say little is known about the potency of their venom.was one of the biggest of five bluebottle species found in Australian waters.
"It doesn't turn up on the Gold Coast beaches all that often. They're usually further south," she said. Professor Pitt estimated the species' float or sail, which sits on the water's surface, was about 10 centimetres in length, while its stinger could stretch several metres.
"It is quite likely that the different species have got slightly different venom," she said. "In terms of the way people react, it is dependent on the dose they get and the dose depends on the amount of tentacle that's attached to the skin. "Gold Coast City Council lifeguard supervisor Scott Franzmann said despite the busy school holidays, the impact had been relatively minor, with 20 stings reported across 39 patrolled beaches.
"We don't get them until about December, January, around that Christmas period. "Gold Coast resident Tera Jesperson said she saw bluebottles the size of a fist "all over the shoreline". "I don't want to be stung — I never have and never want to be. "The Australian Marine Stinger Advisory Service describes bluebottle stings as "instant and sharp" but not life-threatening.
The Royal Australian College of General Practitioners recommends removing any tentacles off the skin with gloves or tweezers before washing the sting with seawater. Professor Pitt said researchers only concluded last year that five different bluebottle species existed, with the survival of larger stingers potentially assisted by warmer El Niño conditions this season.
"The sail of the bluebottle can be offset either to the left or the right of the body's axis," she said. "It's like having a yacht sailing on two different tacks — you'll get some more commonly deposited on beaches under north-easterlies or some more commonly deposited under north-westerlies. " Gold Coast resident Mark Wallace said he had seen similar large bluebottles further south when he was a beach inspector at Manly, Sydney.
"I don't know what the phenomenon is, but there must be something. "
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