Editing Triumph of Spring (Fortune: Evolution Game) (section)

===Rock Slug===
[[File:RockLeech_00.png|200px|thumb|An adult Rock Slug]]
The '''Rock Slug''' is a filter feeding aquatic invertebrate with a complex lifecycle. It is primarily found in the Abyss region, where it serves as prey for many other species. Its adult form is a small, rocky-shelled creature that uses suction to slurp mud into one of the seven mouths on its underside. It also possess two very large tentacles whose primary purpose is mating, It also possess two very large tentacles whose primary purpose is mating, bearing the fertilized eggs and then the larval forms of its species. 

The Rock Slug's next stage depends on being eaten by one of the many varieties of '''Raveshark'''. Once inside the predator's stomach, the mother is digested and the larval slugs are thus freed from the coral-like birthing chambers they formed on her tentacles. As ''medusae'' (singular, ''medusa''), they spend some time as parasites; feeding on the Raveshark's intestines before being ejected into the sea. 

Once back in the sea they find a place to settle down and form a tube-like polyp, extruding tentacles into the water and feeding until they grow large enough to [http://en.wikipedia.org/wiki/Strobilation strobilate] into their adult form.

There is a segment of the Rock Slug population that possess toxin-generating cells (contained in their "tails"), which give the slug a sting attack not unlike Earth's jellyfish. These creatures are known as '''Stinger Slugs'''. Stinger Slugs look identical to their non-stinging kin, and other than their toxin production, they are no different that Rock Slugs. Indeed, they are the ''same'' species. Stinger Slugs result if the mother of a brood  of larvae is eaten specifically by a '''Ravedragon'''. It is then, during their time as medusae in the dragon's intestine, these larvae  will steal the some of the fish's toxin cells to use for stings of their own once they are ejected and mature into adults.

There are ''many'' varieties of Rock Slug or slug-dervied creatures (referred to tenatively as ''Slugiformes'') living all over the ocean, covering every depth range. Some maintain their original parasitic lifestyle, latching onto other animals to feed on their blood (like Earth leeches). Some of them are filter feeders. A few of them prey upon other slugs, using beak-like structures to crack open tough shells. A rare few of them (the jellyfish-like '''Stinger''' which lacks a solid slug-form, for example) maintain stinging cells in their tentacles or cilia.

Most of them have simple life-cycles, going from fertilized egg into a tiny version of their full-grown parents. Others utilize varying forms of the slug/medusa/polyp life cycle, providing the ocean with a range of shellfish, sessile filter feeders, parasites, and jellyfish-like organisms.