Chrysaora melanaster

noun - Chrysaora melanaster, commonly known as the northern sea nettle or brown jellyfish, is a species of jellyfish native to the northern Pacific Ocean and adjacent parts of the Arctic Ocean. The medusa of the northern sea nettle can reach 60 cm in diameter with tentacles growing up to 3 meters. The number of tentacles is up to 24 (8 per octant). The sting is mild, although can cause serious skin irritation and burning.