Go ahead! Stretch your e-magination and test yourself. Click on the right answer and get the full scoop. Get it wrong—try again. Three-toed sloth.   Green turtle.   Sea slug.   Caterpillar. Right! The eggs of a nudibranch, or sea slug, enter the world in the form of wide, brightly colored ribbons often found attached to rocks or pieces of coral on the seafloor. This specimen was photographed off the coast of Sabah in Malaysia. What creature’s “birthday” package comes wrapped in these lengths of scarlet ribbon? Hint: This animal can be a little sluggish. Photograph by Tim Laman

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