National Geographic Daily News

Purple Nudibranch

Photograph by Tim Laman

A lavender-colored nudibranch feeds on hydroids near Vatu-i-Ra, Fiji. Related to sea slugs, nudibranchs are shell-less mollusks that display some of the most vibrant colors found anywhere in nature.

(For more pictures of the amazing colors of our world, buy the National Geographic book Life in Color.)

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