If You Notice This Freakish Creature Washed Up On The Sand, Experts Urge You Not To Get Too Close

You see, creatures in the mollusk family are invertebrates, meaning they have soft bodies and no backbones. Some of them, such as snails, have evolved to use shells to protect their vulnerable forms. Blue dragons, on the other hand, belong to a group of sea slugs – called Nudibranchia, or “naked gills” – that never develop shells.