Lion’s Mane Jellyfish Swamp Melbourne Beaches Carnivorous lion’s mane jellyfish, which can grow up to one metre across, have found a new home in the waters of Melbourne’s beaches. Pools of the creatures have been spotted all the way from Altona to Edithvale, making swimmers second guess getting in the water. Heavy La Nina rainfall is thought to have increased nutrient levels in the water, boosting population numbers. The jellyfish use their tentacles to sting and catch small fish, crustaceans an