Here are a couple shots from my trip to Donsol, Philippines a week ago. The experience is heart pounding to say the least.
We saw over 40 whale sharks in two 1/4 days of cruising around the bay. Scuba equipment and strobes are prohibited in that area. The viz was terrible, the first day was 10 feet max. Three days later the viz cleared up to maybe 20 feet. Ironically it's the nutrients in the water that attracts the animals.
If anybody wants to do this, be prepared to swim hard. You will want a good pair of fins, preferably something that works well at the surface. The guides will grab onto your arm and help you kick to stay ahead of the whale shark. It took me the first day to understand how the whole snorkeling thing worked as well as to assess the lighting situation. The guides and sighters will say "get ready". That means you will be in the water within 30 seconds. It's best to have fins and mask on, camera ready, and you should be sitting on the side of the boat ready to jump. Jumping looks more dangerous than it really is. The chances of banging your head against an outrigger is small, but very intimidating.
I was told by some friends to shoot in automatic mode. I've never shot my Canon 20D underwater in anything but manual. By the second day I choose to use automatic and I think that's really the way to go for these surface shots. There is literally no time to make adjustments because you are kicking like hell.
I saw my guide do some amazing things with the whalesharks. For some, they would consider this molesting the animal, but hey, at least they aren't killing them anymore. They're able to tickle the whaleshark and make them tip over to one side. I saw this with a 45 foot wshark.
An interesting observation that made me feel good was the two days that I went diving offshore, the dive boat would have a sighter at the front of the boat to make sure that we didn't run over any whalesharks.
A small gallery is located at:
http://www.pbase.com/wychen/uwdonsol2006

