Haliclystus antarcticus

The phylum of the Haliclystus antarcticus is cnidaria, the order is Stauromedusae and the  family is the Lucernariidae. It is called a stalked jellyfish because it has a stalk-like band of neurons that is divided into four chambers. It has 8 arms that radiate in pairs, giving it radial symmetry. Each of those arms has 200 tentacles that is coated in the stinging cell cnidocyte. It was discovered in Antarctica but there has been reported sightings found in Argentina and Chile. I wonder why the organism can be found in both drastic climates.