Dear Sylas,
The "savannah" approach is not really the "other" approach.
I'm unfortunately not knowledgable in primates ethology but I can't believe that aquatic was a safe place to live in the context of he is exposed. The Savannah was also under the rule of large predators but the space was wide open.
You can't reach the same conclusion near or in a pool. Never heard about crocodiles, thirsty felidae?
Denesha