John--
I couldn't imagine they would come up out of the water either. I initially thought that I had to have a snapping turtle in the pond, although I have a lot of fish and so thought it would be unlikely a snapper would go for greens plus I didn't have any half-eaten fish floating around. But then I actually saw the grass carp up about 4-6 inches on shore, and when I (carefully) asked my brother-in-law, a landscape architect with a lot of pond experience, about it, he said he had heard of the amur doing this in other ponds which had been stripped of bottom-growing plants. Also, there is no doubt that a big batch of elephant ears was decimated over a two-night period, and I couldn't imagine a snapper eating that much (I mean, probably about a dozen leaves from between 8 and 14 inches, together with stalks). So, I'm pretty well convinced; these are big, quick and hungry animals and, well, I think they breach the shoreline to eat. Call me crazy!!
Rick