Grania

Grania is a genus of marine annelid worms in the class Clitellata. They are found at many depths in sands throughout the world. They are generally about in length and mostly colorless or white, though "Grania colorata", a recently discovered species found in the Great Barrier Reef, is green.
Species.
There are 72 species in the genus "Grania" which have been identified. They include: