Hi there,
I was on the web today and found a link to THIS.
It's a great little locally made video on reef care when snorkeling. Anyone planning to snorkel ought to take note of it. Many people know how fragile a reef can be, but others don't. With care we can all enjoy the ocean and it's marvels.
The picture above is of a Redspotted Sandperch (Parapercis schauinslandi). These guys are quite common out in the sand in deep water. They act much like a hawkfish, awaiting prey while they sit on a coral head.
Aloha,
Steve