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

The sea bunny's ears, or the two antenna-like structures on top of its head, are most definitely sensory organs. Called rhinophores, they detect chemicals in the water that helps sea bunnies find food and mates, says Valdés. The rhinophores are covered in little flaps that boost their detection capabilities, allowing J. parva to sense its environment very efficiently. The structure on the sea bunny's behind that looks like a little flower are its gills.