Great shots! A friend just came back from Myanmar and his videos all had a very bluish tint. They were down about 60-90 ft.
Did you use a specific lens filter or were you able to color correct in Vegas?
Also, there doesn't appear to be any lights but the scenes have plenty of ambient light...were you in shallow water..less than 35 ft?
For most of my shots I used a "blue water" filter which is an orange-red colour and flips in front of the lens using a lever on the outside of the housing. Then I white balance on white gaffer tape that I have stuck to the top of my fins. One of these I've scribbled with red permanent pen to make it a pink colour to shift the colour back away from red a little because my shots were coming out a little too red. Most shots still require a little colour correction in Vegas to get exactly right.
I do use halogen lights from time to time but the Sony VX2000 is so good in low light that I don't need them at all for most of my daytime shots unless I'm under a ledge or something. In the Andaman Sea I can normally shoot without lights at 100ft and still no grain in the footage. I even have one shot in my DVD of a cobia at 150ft taken without lights, but that one is grainy.