Was meant as a joke from your reply aboveit photosynthesizes to get energy to grow. aside from what it literally does, it is an aquarium decoration. if simply being a decoration means it has "no actual point", then yes. it has no actual point. it won't start spawning fish. it won't cure ich. it won't kill snails. it won't really feed your fish. it won't wash your car.
They're called Marimo Moss Balls or Japanese Moss Balls or some combination of those words (japanese marimo moss balls even)No you've got MY attention. What is the formal name?