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Ctenophores are probably the most ancient of all multicellular animals. They vie for first place with sponges but, because their body is a fragile and delicate jelly, scientists have no fossilized remains. Some seriously believe that ctenophores came to us on a huge icy asteroid from outer space. But genetically, they're still Earth-born. These planktonic creatures move through the water like zeppelins, propelled by eight rows of comb plates running along their bodies. These plates are made of the thinnest hairs, cilia, like those of the infusoria we all learn about in biology class. Except the infusoria are small, while the ctenophores grow up to 20 centimeters.
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aquatilis.eth
Marine biologist | Underwater photographer and DOP | National Geographic Explorer 2022 | Head of Aquatilis Expedition | Head of the Scientific Diving Department at the White Sea Biological Station
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