A 13-year-old boy dies in Thailand. He swims in the sea on Saturday. A box jellyfish stings him. The animal has a strong poison. It is very dangerous.
The poison hurts the heart. The boy loses consciousness. He dies soon after. Helpers also get hurt. But they survive.
The authorities in Thailand warn all people. Do not touch the animals. Vinegar helps after a sting. Wash the wound with vinegar. Do not use water.
Many beaches now have emergency stations with vinegar. The coasts get more watch. People must take care.
