Did I know this? Not sure. But it’s a fact that becomes alarmingly clear when I spot a troop of crab-eating macaques dive into the water from the shores of a rocky islet and paddle furiously out to sea. Their objective is another longtail boat that has dropped anchor not far from ours. It’s crowded with day-trippers from Krabi who have come armed with bananas to coax the monkeys into this display of aquatic athleticism. While most of the troop is content to bob at the boat’s bow to await their reward, its more piratical members try to climb aboard. They are shooed away by the boat-man,
