This is a rotifer (the Latin word meaning “wheel-bearer.”). They are “microscopic aquatic animals… found in many freshwater environments and in moist soil, where they inhabit the thin films of water that are formed around soil particles.” Though they can get bigger, they’re usually around 0.1–0.5 mm long.
These rotifers are feeding… according to the video notes, the first one has a cell caught in a vortex caused by the two sets of cilia near its mouth.
“Rotifers play a key role in filtering out the decomposing organic matter contained in water. And those rotifers, in turn, make nice snacks for fish, shrimp and crabs. A single drop of pond water might contain 50 to 100 rotifers.”
Watch these related videos next:
• Microscope video of a Limnias melicerta (a rotifer)
• Wim van Egmond’s award-winning microscopic videos
• What Lives In Moss?
This Webby award-winning video collection exists to help teachers, librarians, and families spark kid wonder and curiosity. TKSST features smarter, more meaningful content than what's usually served up by YouTube's algorithms, and amplifies the creators who make that content.
Curated, kid-friendly, independently-published. Support this mission by becoming a sustaining member today.