The Blue Velvet Nudibranch is navy blue and black with neon blue lines running along its body. If you have Flatworms in your aquarium this species is highly recommended.Headshield Slugs are part of a Class of Mollusks known as Gastropods. These snail-like creatures do not use a shell for protection. These creatures have heads that are shaped like a shield. Their body is usually an elongated oval shape. The mantle of these Slugs runs down the center of their back. Most Headshield Slugs have specialized diets.
Blue Velvet Nudibranch