Sea Slugs
Sea Slugs are like the middle man of the Molluska world. While the Squid can be compared to humans, and clams to rocks, the sea slugs are generally in the middle. Sea Slugs (or slugs in general) have spread ganglia over the body, which act as nerve nets. Much like the jellyfish, however more compact and complex. Sea Sugs do have a central brain and communicate with others of its species.