>>56034032Monitor lizards and gators come to mind. This goes for any critter, but if you live a sedentary lifestyle, and you eat a lot, you can get pretty chubby.
Lapras isn't based on either of those, though, so I suspect a different reason for its fatness-- blubber. It keeps it buoyant and warm, because fat floats and insulates. Same reason other large sea animals like seals and whales have it.
