mad-as-a-marine-biologist:

natureofnature:

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 Ctenophore [Phyla] also known as comb jellies. Their most distinctive feature is the “combs”, groups of cilia they use for swimming, and they are the largest animals that swim by means of cilia – adults of various species range from a few millimeters to 1.5 meters (59 in) in size. Like cnidarians, their bodies consist of a mass of jelly, with one layer of cells on the outside and another lining the internal cavity.