What do you need to know about jellyfish sting?
Jellyfish are bell-shaped, gelatinous creatures with tentacles that may reach more than 3 feet. Jellyfish that are harmful to humans have stingers that can pierce the skin venom. Other creatures with stingers include Portuguese man-of-war, sea wasps, anemones, and fire corals. Some venom can trigger allergic reactions. The most toxic stinger animals live along the Indo-Pacific and Australian waters.
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