Overview of Marine Bites and Stings By Robert A Barish, MD, MBA, University of Illinois at Chicago; Thomas Arnold, MD, Department of Emergency Medicine, LSU Health Sciences Center Shreveport Reviewed / Revised Jan 2022 | Modified Sep 2022 View Patient Education Some marine bites and stings are toxic, such as those inflicted by Cnidaria (or coelenterates, such as jellyfish and sea anemones) Mollusks Sea urchins Stingrays All create wounds are at risk of infection with marine organisms, most notably Vibrio species, Aeromonas species, and Mycobacterium marinum.