Sloopdilmonpolop was a minor Underdark city of the kuo-toa. The city was home to the Sacred Pool of the Sea Mother, a square, subterranean lake occupying a cavern nearly 1,000 feet long and wide. It was dedicated to the worship of Blibdoolpoolp. Dagagoorg served both as Priest-King (Va-Poolgol) of Sloopdilmonpolop and high priest of the Sacred Pool of the Sea Mother.