Jellybeams are new jellyfish enemies in New Super Mario Bros. Wii. They are small blue jellyfish with eyes. They create light from their undersides. Jellybeams do not sting or chase Mario at all. Although they help Mario, to see underwater, if Mario touches them, he takes damage. You can kill them if you want to, but it won't make any sense, because you won't be able to see. Jellybeams have a wide variety of light. Their light has much more range. That is why you must not kill them, plus it is dark in the underwater levels they appear in. Jellybeams appear in one of the last worlds in the game. If you can make it there, you'll see them.