Oh that makes me want to go back to Fiji! I was just there last week! One of the places we stayed had the most beautiful reef I've ever seen.
The corals he's filming look like some of the ones on one side of the island. It was really shallow there (never came out of the water while I was there, but I'm sure it can happen on a really low tide). The corals were spaced out a little ways from one another and they were all short and little, but still really colorful. As soon as it got deeper, the corals where huge and crammed in next to one another. Crazy how they can cope with such hard conditions!