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Philodina sp.
Species name:Philodina sp.
Bureau Swerage, Tokyo Metropolitan Government
The size of Philodina is 300-1,000 μm in length. The body is thin long. One foot with four toes. The head has two crown of chilia. The eyespots lie on the brain. It moves like leeches. It shows leech-like movement and moves around flocs. Philodina feed on algae and bacteria. It can retract cron of cilia into the body.