Deadly blue-ringed octopus spotted in the Parramatta River for the first time in more than 50 years
The golf ball-sized sea creature contains a neurotoxin so lethal it has been estimated the venom from just one 25g creature can kill ten 75kg humans.
It may have no sand, but Putney beach, which opens on Wednesday, gives residents far from the coast the chance to have a dip without the long commute
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