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The Invisible Zoo

These animals live here. Come and meet them.

A single cell, shaped like a long-stemmed trumpet, is anchored at its narrow end and fans open at the wide end into a rim of beating cilia that pulls water — and whatever is in it — down into the cell. The whole body is blue-green. It sways slowly on its stalk, exploring the water around it, and every so often snaps shut, contracting to a fraction of its length in a fraction of a second, then unfurls again and resumes feeding.
Stentor
The Blue Trumpet
A green sphere rolls slowly through the frame, turning about its own axis as it travels, driven by thousands of tiny whips beating in coordination across its surface. It is hollow and translucent, and inside it float several smaller spheres — its daughters, already complete, growing until the parent breaks open and releases them.
Volvox
The Rolling Sphere