Ctenophores Ctenophora (ctenophore from Ancient Greek) comprise a phylum of marine invertebrates, commonly known as comb jellies, that inhabit sea waters worldwide. They are notable for the groups of cilia they use for swimming (commonly referred to as "combs"), and they are the largest animals to swim with the help of cilia. from The royal natural history EDITED BY RICHARD LYDEKKER Volume VI 1896

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