Columbia Deep is a popular dive site located off the western coast of Cozumel, Mexico. It is part of the larger Columbia Reef system, and is known for its dramatic wall formations, colorful coral reefs, and abundant marine life. The dive site is suitable for experienced divers due to its depth and currents. Divers can expect to see a variety of marine life at Columbia Deep, including: Reef sharks Sea turtles Eagle rays Moray eels Angelfish Butterflyfish Sponges Corals