[kuyrin]

Marimos / Moss Balls or more specifically Aegagropila Linnaei

here is a couple of links for those interested in cultivation these mossy balls.

theaquariumwiki.com/Aegagropila_linnaeii
greenculturesg.com/articles/jun07/jun07_marimos.pdf

You can divide your balls and those divisions will begin growing.
When in the right condition your balls will float and then begin parting on their own. When your balls drop... Well, we know what happens. Hehehehe. :hihi:
I couldn't resist! But in all seriousness follow those links for growing information.