Merlo Reef is a large reef located off the coast of Sudan in the Red Sea. It is a popular diving destination known for its clear waters, abundant marine life, and dramatic walls. The reef is about 1.2 nautical miles southwest of Angarosh and rises steeply from the seabed, which is over 450 meters deep. The reef wall is partly overhanging to a depth of about 15 meters. In this area the reef is very rugged with many crevices.