Comb Jelly
Ctenophores are commonly called comb jellies because they use rows of hairlike cilia to propel themselves through the water. This unique physiology also causes comb jellies to refract light, so they often shine with a rainbow of iridescent color. In the absence of sunlight, comb jellies can still be colorful, if less vivid. Most species are bioluminescent.
(source:google/http://ocean.nationalgeographic.com/)
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