Box Jellyfish

This large but almost transparent "Box Jellyfish" is up to 30 cm across and has up to 15 ribbon-like tentacles from each of the four corners.
This jellyfish delivers a severe and potentially life threatening sting. The sting causes severe burning skin pain, often with tentacles remaining on the stung area. Severe stings may cause the victims breathing to cease or their heart to stop.
  FIRST AID Priorities for a serious tropical marine sting
Rescue/Recovery:Remove patient from the water
1. Call for help   -Lifesaver/Lifeguard or dial 000 for Ambulance
2. Emergency Care   -CPR if needed
3. Treat the sting     - Pour vinegar onto sting 
4. Seek Medical Aid   -Transport to Hospital/Ambulance