Bright blue rings flash as a warning. Check carefully before removing any bottle or tin from the water. As the bite is not painful, the victim may not realise they have been bitten until symptoms begin.
Breathing becomes difficult, leading to collapse and paralysis.
Take the victim to a doctor or hospital. Give artificial respiration if breathing stops. Maintain breathing until medical help can be given. Bluebottles are related to jellyfish. In case of an emergency only swim in areas patrolled by life-savers.