Stinging Radiocritter

A mutation in a group of Swimming Radiocritters led to some developing very long, thin leaves inside all the others, leading to the evolution of the Stinging Radiocritter. Their tentacle-like leaves also have nematocysts capable of releasing a mixture of spite and radiation into whatever it stings which it can use to both deter predators and kill prey. The area between their paddle-like leaves has became like a stomach, where they can close it up to digest food, such as prey they caught, or things that got stuck to their tentacle-like leaves. Other than that, they are nearly exactly alike their ancestor, one last major difference is the lack of cell walls around cells inside their 'stomach' which instead have a tough membrane resistant to the digestive enzymes they release to break down food.