Marimo are one of nature’s most alien spectacles ... bubbles simply build up inside the suit. When enough oxygen is exhaled, the ball will actually become buoyant, floating over the object ...

Scroll down for video Beach-goers said they'd never seen anything like it, describing the balls as 'alien eggs, 'alien hairballs', Japanese moss balls and UFOs (Unidentified Floating Objects).

At times the shape was like a spacecraft while it also looked like a turtle shell, a ball inside with white outline ... miles north of where the object was floating above the Winn-Dixie in Green ...

Mark Watkins, 36, was out fishing with his dad south of Perth when they spotted the alien-looking pink sphere. The pair originally thought it was a capsized boat, then maybe a fallen hot air balloon.

In July, NASA astronaut Terry Virts inserted an effervescent tablet into a ball of water to observe it dissolve and release gases inside the water and into the air. In Kelly's experiment ...