pakman
Contributor
All transactions (Boatman/Guide) are handled by the tourist center. You need to watch a short film clip (< 30 mins) regarding the rules of interaction with the "Butanding" prior to setting off. I would advise you to come early so as not to compete with other tourists because they implement a 1 whale shark 1 boat policy. The sea tends to get crowded as it nears midday. Maximum is 6 persons to a boat. I forgot how much per person but I think it is around 500Php for a half day of shark chasing.
Pao
good advice Pao. But, not all the boats follow the 1 boat per whaleshark rule. I'd say most time they do respect that rule, but there were a few times where it was broken. Maybe because there were so few sighting one of the days we were there. One bangka dropped a group literally on tops of us as we swam along a whale shark.
Tarzana - oh, and get ready to swim hard... The whale sharks look so graceful and slow given their size, but try keeping up with one in the water... After a couple of hours, we were pooped. But then, we're waay out of shape...