Euglena comes in and out of aggregate

Several Euglena organisms go in and out of a large aggregate as if it were a comfortable residence for them.

Commentary by Prof. Yuji Tsukii, Hosei University
The organism may be Euglena viridis, but because the shape of the chloroplasts is vague in this video, the species level cannot be determined.

http://protist.i.hosei.ac.jp/PDB/Im.....

Sampling Date : 02 July 2009

Sampling Site : Hirose River A  Google Map