With over 3,000 species in their animal group, sea slugs (aka nudibranchs) exhibit many variations in seemingly limitless shapes and colors. The soft-bodied mollusks mimic their surrounding sea-bottom plants and coral reefs. Have you taken fantastic shots of marine life? Share your best one as a comment here with this format: [Flickr individual-photo page URL] See more galleries: Secret Lives of Squirrels | Beautiful Butterflies