This squishy bag of algae is a Paramecium bursaria. They don't digest the algae, instead, they let it photosynthesize, so the P. bursaria can get part of the sugars produced by the algae.
This squishy bag of algae is a Paramecium bursaria. They don't digest the algae, instead, they let it photosynthesize, so the P. bursaria can get part of the sugars produced by the algae.