Gravedorcus (グラベドルカス) appears in Castlevania: Order of Ecclesia's Oblivion Ridge, as the game's 7th boss. He is a fish-type creature described as a sand dragon with a giant dorsal fin that swims around in sand. His attacks consists of poison breath, exploding spores, and trying to ram Shanoa.
He also spawns two platforms for you to stand on and (somewhat) safely attack him. Eventually, he will break both platforms to be able to ram you down by jumping out of the sand. He will hit the wall, though, allowing you to attack him until he sinks back down into the sand. His weak point is his whole body, and he is weak against Blunt and Ice attacks. Combine the Vol Macir and Vol Grando Glyphs for devastating results.