In case you were curious, is it possible for a marimo the size of a speck to live at such a small size, the answer is yes, Speck is still alive. I created Speck back in July of 2015. I kept him in the original vial and changed his water about two or three times just by slowly adding clean water into it.
|Speck, possibly the world's smallest marimo.|
Thumbtack used to compare size.
Sorry about the wonky lighting, everything else had a glare from the glass.