| http://www.w3.org/ns/prov#value | - For a phylum with relatively few species, ctenophores have a wide range of body plans.[8] Coastal species need to be tough enough to withstand waves and swirling sediment particles, while some oceanic species are so fragile that it is very difficult to capture them intact for study.[5] In addition oceanic species do not preserve well,[5] and are known mainly from photographs and from observers' no
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