Cubozoa. Box Jellyfishs . Carybdeas . Chironices . Cubozoas . Jellyfishs, Box . Sea Wasp . Wasp, Sea . Wasps, Sea . Box Jellyfish . Carybdea . Chironex . Jellyfish, Box . Sea Wasps . The class of box jellyfish, in the phylum CNIDARIA, characterized by their cube shape, and considered the most venomous jellyfish. . 0.65