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.
Carybdea branchi
This jellyfish is found from the north of Namibia and around the South African coast to Port Elizabeth from the surface to a depth of at least underwater.