The blue jellyfish is a flat average-sized jellyfish. The jellyfish can sting severely with its long hairy tentacles located on the rim of the bell. Blue jellyfish are often found close to the shore with easterly winds. During the summer, they can spoil a warm beach day for bathing guests. Beach pavilion owners seem to easily forget previous jellyfish invasions. Every times there's an invasion, you always hear that "it has never been this bad".