Pectinatella

Resembling gelatinous detritus or aquatic plant growth on submerged sticks and other substrates, bryozoans are primarily marine, but are also found in freshwater rivers and impoundments. Commonly referred to as the moss animals, these sessile colonial creatures were thought to be plants similar to their ecological analogs, the corals, until the mid-1700s. Of the thousands of species worldwide, one class, Phylactolaemata, is found exclusively in fresh water. Known as the jelly blobs or simply "blobs", Pectinatella magnifica is a relatively common North American freshwater species of the phylum Ectoprocta.