Spirostomum Video No. 3
Some of the largest ciliates belong to the genus Spirostomum, some species large enough to see with the naked eye. These organisms hold the record for the fastest body contractions of any living cell, contracting it's length to 25% of its normal size in 6-8 milliseconds. Spirostomum feeds on bacteria and during cold weather forms large clusters of organisms that hibernate together.
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