We had the annual “looking at muck down a microscope” practical last week. As usual, the best thing we saw was a ciliate in some pond water, in this case a little trumpet animalcule:

Stentor sp. [CC-BY-SA-3.0 Steve Cook]

Stentor sp. The green bits are either symbiotic algae, or dinner, possibly a bit of both.

Previous winners: Vorticella and Lacrymaria. The Ciliata really are the phylum that keeps on giving.

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