In order of size, from smallest to largest
Closterium pronum
https://youtu.be/Jh1p7lE4y_k
Closterium abruptum
https://youtu.be/CNkRYykhoJo
Closterium angustatum
https://youtu.be/Ty4rBk3giIM
Some Closteriums
Moderators: rjlittlefield, ChrisR, Chris S., Pau