Walking on a beach or swimming in the ocean can
be fun and relaxing. But just like any other activities, accidents can happen.
This topic will help you determine the next steps to take if you have a
jellyfish or Portuguese man-of-war sting, seabather's eruption, or a coral
Jellyfish and Portuguese man-of-wars are
members of a large group of venomous marine animals that also includes fire
coral and sea anemones. They are present all over the world and cause injury
and illness through the release of venom when their
tentacles come in contact with skin (stinging). Tentacles are long, slender, flexible growths found on jellyfish,
Portuguese man-of-wars, squid, and octopuses. Tentacles are used for grasping,
feeling, moving, and killing prey by stinging. While
the sting of a jellyfish or Portuguese man-of-war can cause severe illness and
extreme pain, documented deaths are rare.
Jellyfish are often
present in coastal waters, having been brought ashore by winds or ocean
currents. They are most common in warm ocean waters, especially along the
Atlantic coast of the United States. Stings result from contact with the
tentacles, which trail from the jellyfish's see-through body. Jellyfish
swimming in the water are often hard to see. Beached jellyfish, which may look
like the cellophane wrapper from a cigarette pack, can sting if touched.
Jellyfish stings cause immediate, intense pain and burning that can last
for several hours. Raised, red welts develop along the site of the sting, which
may look like you have been hit with a whip. The welts may last for 1 to 2
weeks, and itchy skin rashes may appear 1 to 4 weeks after the sting.
Fortunately, most jellyfish stings are not severe. Extensive stings,
allergic reactions, or
severe reactions are not common but do occur. To
avoid the risk of drowning, swimmers should get out of the water as soon as
they realize they have been stung.
The box jellyfish, which is
found in the Indian Ocean and South Pacific, can cause a fatal reaction. It is
the only jellyfish for which a specific antidote (antivenin) exists.
If you get this antivenin, it may save your life.
Seabather's eruption is a rash that develops from the stings of jellyfish or sea
anemone larvae. The rash can be quite itchy and annoying, but it usually goes away
without medical treatment in 10 to 14 days.
(hydrozoans) live in warm seas throughout the world but are most common in the
tropical and subtropical regions of the Pacific and Indian oceans and in the
Gulf Stream of the North Atlantic Ocean. They float on the surface of the water
with their long, stinging tentacles trailing in the water below. Detached
tentacles that wash up on the beach may remain dangerous for months.