I recommend this reef for snorkeling, as it's shallow enough to see ocean life close to you.
First thing off was a baby shark. But it was way down under a rock. Still brought shivers.
The water is not calm, but not as strong as the Palancar Reef.
Had several great dives here recently. Lovely coral heads and swim throughs with plenty of shark, turtle and lobster sitings. Couple of juvenile drum and other micro too if the current is not too strong. Enjoy!
Columbia Deep is THE wall dive to do on Coz & Columbia Shallows has always been and remains my favorite dive site on the island ... bring a shovel if you want to go below 30' here, "aquarium" diving at it's best!
We have seen better reefs with more fish. This was a big disappointment. We took a snorkel cruise to 3 different reefs, and none of them were very good. If you have snorkeled in Hawaii or Belize, you should skip this reef.