Black with numerous white dots - reminiscent of the Milky Way which is what its name refers to. The body structure is unusual with a stiff mantle edge and a 'neck' behind the head which then widens out up to the gills and followed by a long tail. Rhinophores are perfoliate with a white line running up the middle. Gills are white with a black line running to the tips. Both are retractable.
Behaviour / Habitat
Feeds on and mostly found on the leather like foliose sponge.