That's odd, the Parks Foundation told me last week that it will re-open at the beginning of April - see a photo and story at
www.wilmacozumel.com
cometocozumel.com is a great site, but it is not an 'official' site, so I would tend to trust what the foundation told me over what they said... maybe they meant the dolphin attraction within Chankanaab won't open until June..?
Ian
www.wilmacozumel.com