Only the outer edge of this amoeba remains transparent as the center of its body is packed with food particles. Perhaps it is resting between meals.
Commentary by Prof. Yuji Tsukii, Hosei University
This organism may be Vannella.
Usually Vannella moves exhibiting a specific shape as shown in the above link. However the organism in this video doesn’t move around, which makes it difficult to decide what it is. It is also possible that the organism is not Vannella, but rather may be a dead protozoan cell whose body is collapsing, causing it to exhibit a similar shape to Vannella.
Sampling Date : 02 July 2009
Sampling Site : Hirose River A Google Map