That group contains Chironex, the most deadly animal on earth, and is known as Cubozoa.
One group of organisms in this phylum releases venom by polymerizing the contents of a capsule and causes Irukandji syndrome in humans. That group contains Chironex, the most deadly animal on earth, and is known as Cubozoa. Organisms in this phylum, many of which can form a planula, are capable of motion by jet (*) propulsion and tumbling, depending on their body shape. These organisms have a middle layer of mesoglea and harpoon-like nematocysts. For 10 points, name this phylum which alternate between medusa and polyp form and includes the Portuguese Man o' War, hydra, and jellyfish.
One group of organisms in this phylum releases venom by polymerizing the contents of a capsule and causes Irukandji syndrome in humans.
{Cnidaria}ns