There are a lot of out of focus suckers coming forward and going away from the viewer. From Wrattens pond 18th Jan 1989. Suctoria Family Acinetina. Tentacles 35 - 40 microns long. Suctoria belong to the class of ciliated animalcules, phylum Ciliophora.
Multiplication is by budding and the detached buds are completely ciliated.
Other specimens in the water were almost certainly Tricophyra epistylidis . Both species inhabit freshwater only. There are about 45 genera and many species. There are other phyla that are marine. Freshwater Life ' John Clegg 1952, revised 1974.