Chrysaora plocamia

The South American sea nettle (Chrysaora plocamia) is a species of jellyfish from the family Pelagiidae. It is found from the Pacific coast of Peru, south along Chile's coast to Tierra del Fuego, and north along the Atlantic coast of Argentina, with a few records from Uruguay. Despite its common name, it is not the only sea nettle in South America; C. lactea ranges along the Atlantic coast of the continent, but generally further north than C. plocamia. Historically, C. plocamia was often confused with C. hysoscella, a species now known to be restricted to the northeast Atlantic. C. plocamia is a large jellyfish, up to 1 m (3 ft 3 in) in bell diameter, although most mature individuals only are 25–40 cm (10–16 in).