"How to ID a rotifer:
The word rotifer is used to describe an entire phylum of animals, much like the word chordate is used to describe animals under phylum chordata (they all have some sort of notochord/nerve cord at some time during their life).
For rotifers, the following two ID characteristics are what I use:
1) The tweezer-like feet as seen in this video and,
2) The ring of cilia that is on the opposite end of the tweezer feet. Sometimes it is bushy, other times compact... but always there.
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