The Oliis Bay or the Oliil Bay is a bay located near the city of Lilmoth in Black Marsh. The name was coined by the Imperials when they had control over the region. The bay is inhabited by Sea Drakes, which are large crocodiles with paddles instead of legs. Like many parts of Black Marsh, the bay is filled with mangroves. There are small sandbars that get submerged by the high tide. This tide can also reach the waterfront of Lilmoth.