LOL.... The adventures of koi keeping! I occasionally get small baby ringneck snakes in the skimmers. They fall in the pond by accident and end up finding a spot out of water inside the skimmer. Same with the occasional anole lizard. Mostly I get toads and an occasional frog. If any get past the skimmer basket when I try to get them out, they are quickly sucked to the pump. But, there are leaf baskets on all of my pumps, so I am able to retrieve them from it before they reach the pump itself. Summer rains bring out the toads for spawning in the pond. Some mornings there over 20 in the skimmers making the most awful shrill noise.... the skimmer acts like an echo chamber.