![Vorticella micrograph [CC-BY-SA-3.0 Steve Cook]](https://www.polypompholyx.com/wp-content/uploads/2012/10/vorticella_micrograph-282x300.jpg)
It’s nice to find out that – old and jaded as I am – biology can still delight me. Earlier this week, I covered a first-year practical teaching microscopy skills to first-years, through the medium of pond water. As well as the usual desmids, rotifers, Daphnia and nematodes, one lucky student found a little clump …