Biome of small protists in a mature biome

[Don Schaeffer]

The mudpuddle has been going for more than a couple of months now. The evolution of maturing biomes has shown up. These pictures were taken when one major biome was going for about two months. Small and medium-sized protists were active and some of those low-motion protists formed colonies in the water. Those longer almost rectangular organisms are common in mature biomes.

https://youtu.be/M-ZwuNXhunc