出典:Wikipedia
出典:『Wikipedia』 (2011/02/06 12:35 UTC 版)
Grania is a genus of marine worms in the class Clitellata. They are found at many depths in sands throughout the world. They are generally about 2 centimetres (0.79 in) in length and mostly colorless or white, though Grania colorata, a recently discovered species found in the Great Barrier Reef, is green. 71 species in the genus Grania have been identified.