Are the 2 blue holes in Belize connected?

The Great Blue Hole and the Blue Hole National Monument in Belize are not connected. The Great Blue Hole is a large, deep, circular sinkhole off the coast of Belize. It is 124 m (407 ft) deep, 305 m (1,000 ft) in diameter, and about 150 km (93 mi) from the mainland and a half mile from Lighthouse Reef. The Blue Hole National Monument is a protected area of the Belize Barrier Reef that includes the Great Blue Hole, as well as several smaller ones.