Chiropsalmus quadrumanus
Chiropsalmus quadrumanus, commonly known as the four-handed box jellyfish, is a species of box jellyfish found in the western Atlantic Ocean, the Gulf of Mexico and the Pacific Ocean. The sting is venomous and dangerous to humans, especially children.
Aglantha digitale
"Aglantha digitale" is the most common species of jellyfish found in surface waters in the Arctic and sub-Arctic. It occurs above the continental slope but is more common over the deep ocean, seldom occurring at a depth greater than .