Art illustration - Oceans & Seas - Sea Bunnies: (Jorunna parva) is a species of sea slug, marine gastropod mollusk jorunna without shells, measuring 2.5 centimeters long, usually yellow or white. They usually live for about a year. They do not have predators because they contain toxins that come out of their "fur" that is nothing more than small black rod-shaped spines. the protuberances that resemble ears are actually sensory antennas that they use to hunt their prey.