NOAA, Ocean Explorer Porpita porpita has a small disc like body and floats freely in the water column. Related to the jellyfish, this species measures just one inch in diameter. Image courtesy of Islands in the Stream 2002 Exploration, NOAA-OE.
Darth Vader jellyfish or the Narcomedusae Found in the Arctic, this is a fairly new discovered species with 4 tentacles and 12 stomach pouches. It swims holding out its poisoned tentacles in front, better to ambush prey.
Giant Jellyfish ~ “The Lions Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before dinosaurs (over 650 million years ago) and are among some of the oldest surviving species in the world.
Australian Box Jellyfish is very dangerous Jellyfish and scary in appearance as well. It is transparent and difficult to see it through naked eye. It is poisonous Jellyfish of the world and faster in motion as well.