We are toe-deep in this air plant trend (I say only toe deep because they are very teeny plants). Also known as tillandsia, air plants are are everywhere you look. If you're like me and you're always on the hunt for an easy-to-care-for plant, chances are you owned at least one. Air plants are cool because they require no dirt, but what if I told you there was a plant that requires no watering because it lives in water?? Ladies and gentlemen, meet the coolest plants on the block: Marimo moss balls.