Chankanaab scuba diving ?

[workathome]

We are going to Cozumel and planning on going to Chankanaab. My son and husband want to scuba dive, I contacted Chankanaab and they said the only scuba they have is Dive with Dolphins. I thought I read some where that you can scuba dive at Chankanaab. One of the reasons I picked Chankanaab is so that everyone in our group could do something that they wanted. If there is an independent dive operator there, is there a way to get in contacted with them? I have a few questions ie. do they have perscription maskes. Thanks for any help, my son really wants to try scuba diving.