This 70-micron oval flagellate travels in a straight line, and then suddenly reverses course. The organism has two flagella. The shorter one wiggles vigorously at the front, and the longer one trails behind.
Commentary by Prof. Yuji Tsukii, Hosei University
This organism belongs to genus Anisonema, most likely Anisonema acinus.
Sampling Date : 28 May 2009
Sampling Site : Hirose River B Google Map