It is an amoeba (ameba) that lives as a single celled being that consumes bacteria but when there isn't much to eat, individual cells will join together to form a multicellular being (a bit like power rangers when all their robot parts join together). When they are all joined together they can combine their movement to crawl large distances compared to their size. They behave more like a worm or slug than a cellular life form when they are one.
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