J is for Jellyfish T-Shirt

When stung by a jellyfish, first aid may be in order. Though most stings are not deadly, some stings, such as those of the box jellyfish (Chironex fleckeri), may be fatal. Serious stings may cause anaphylaxis and may result in death. Hence, people stung by jellyfish must get out of the water to avoid drowning. In serious cases, advanced professional care must be sought. This care may include administration of an antivenin and other supportive care such as required to treat the symptoms of anaphylactic shock. The most serious threat that humans face from jellyfish is the sting of the Irukandji, which has the most potent and deadly venom of any known species.