Freeswimming

In the freeswimming Rotifers the foot has a very different shape but is often formed in accordance with its main function of steering organ.

It swims remarkably well, rotating during swimming, and is able to live in this freeswimming stage for about 36 hours.

Two days after hatching the majority were freeswimming and had become almost transparent in coloration.

Appendix Holotricha-Astomata: freeswimming, more or less completely and evenly ciliate throughout; no oral aperture.