Jellyfish Stings

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Medical Author:

Barbara J. Drobina, DO

Barbara J. Drobina, DO

Barbara J. Drobina, DO is an Emergency Physician in the United States Navy. Dr. Drobina graduated from University of Osteopathic Medicine and Health Sciences, Des Moines, IA. Dr. Drobina completed residency training in Emergency Medicine at Portsmouth Naval Hospital, Portsmouth, VA.

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Medical Editor:

Melissa Conrad Stöppler, MD, Chief Medical Editor

Melissa Conrad Stöppler, MD, Chief Medical Editor

Melissa Conrad Stöppler, MD, is a U.S. board-certified Anatomic Pathologist with subspecialty training in the fields of Experimental and Molecular Pathology. Dr. Stöppler's educational background includes a BA with Highest Distinction from the University of Virginia and an MD from the University of North Carolina. She completed residency training in Anatomic Pathology at Georgetown University followed by subspecialty fellowship training in molecular diagnostics and experimental pathology.

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• Jellyfish Stings Overview
• Jellyfish Sting Symptoms
• When to Seek Medical Care
• Jellyfish Stings Treatment
• Prevention
• For More Information
• Web Links
• Pictures of Jellyfish
• Synonyms and Keywords
• Authors and Editors
• Viewer Comments: Jellyfish Stings - Treatment

Jellyfish are free-swimming, non-aggressive, gelatinous marine animals surrounded by tentacles. These tentacles are covered with sacs (nematocysts) that are filled with poison (venom) that can cause a painful to sometimes life-threatening sting. The marine animals included in the "family" are jellyfish, box jellyfish (sea wasps), Portuguese man-of-war, hydroids, anemones, and fire coral. Jellyfish are found throughout the world. But, the most deadly are found in the Indo-Pacific and Australian waters.

Jellyfish are usually found near the surface of the water during times of diminished light, floating in the water column, or after washing up on the beach. Jellyfish stings are generally accidental - from swimming or wading into a jellyfish or carelessly handling them.

Some types of jellyfish have reproductive jelly gatherings 8 to 10 days after a full moon, thus there is an increase in the number of jellyfish found at that time.

There are over 200 types of jellyfish (that have been documented).