A scene in zoological experiment class

A scene in the Zoological Experiment class.
This is a rotifer, mixed in a pile of paramecium, which is restricted by cotton. These two types of organisms are similar, but their classification is much worse. It is well known that Paramecium is a single-celled organism. They belong to the cysticercus of SAR supergroup and are distant relatives of kelp, while rotifers are multicellular animals – they are real metazoans, located at the base of the evolution branch of flat rotifers, mollusks, annelids, tentacles, crowns, mesozoites and flatfoots. Forms and other animals are also in this evolutionary branch, and rotifers belong to an independent branch, Rotifera.
The video shows two rings of rapidly swinging cilia on the head of the rotifer, which is its wheel. The greatest feature of the rotifer under the microscope is that it has no such structure in other organisms. Through the oscillation of the wheel, water flows into the rotifer body, and the food in the rotifer body is absorbed together.
* Can anyone tell which rotifer it is?Microblog Video of Flash Perch