Meet The Sea Bunnies, The Strange Sea Creatures Japan Has Fallen In Love With

Jorunna parva's fur-like coat is due to bunches of tiny rods, called caryophyllidia, that cover the animal's back. They're arranged around little knobs that are sometimes black, giving the sea bunny its speckled appearance.We don't know for sure what these organs do, says Ángel Valdés, a sea slug expert at California State Polytechnic University in Pomona. But they probably play sensory roles.