In a moist chamber preparation I observed an organism which attacked Leptophrys cells in their cyst.
Leptophrys vorax, cyst with parasite
The same cyst as above, but one day later. The parasite went off.
Leptophrys vorax, cyst with parasites; notice the small ones to the right.
Leptophrys vorax, cyst with two parasites
Leptophrys vorax, three large parasites and a small one…
… one day later. Also the small one left its cover.