Before revision: Several URLanisms, such as bacteria, algae, or spermatozoa, use flagellum or cilium activity to swim in a fluid . Many URLanisms use rather ample shape deformation, described as amoeboid, to propel themselves , either crawling on a substrate or swimming.
After revision: Several URLanisms, such as bacteria, algae, or spermatozoa, use flagellum or cilium activity to swim in a fluid , while many other URLanisms instead use ample shape deformation, described as amoeboid, to propel themselves , either crawling on a substrate or swimming.