>>30685091Lapras seems like a manatee: slow moving herbivore that doesn't tend to cause problems. Manatee are preyed on by sharks and occasionally gators/crocodiles.
Or you could imagine they're more like sea turtles which have similar predators. Surprisingly many sea turtles don't make it to adulthood as they get picked off by crabs, fish and other smaller predators.
Nature will handle itself. Yep.