See ya later alligator. After awhile crocodile. You don't have to have a water feature in your garden to suggest the presence of a nearby swamp. With this cool Swamp Beast Garden Statue you can just hint at the danger that awaits.
This awesome statue is supposed to be a crocodile according to the website, but in my garden it would be a gator. I don't have a pond, but I have a garden that I have designed to resemble one. This guy would be a great addition to it.
If you want to be more precise then here is a Swamp Gator Garden Statue by the same company. This guy is more animated that the other with a snarling head.
Get both and then add this fun sign to make sure that visitors to your outdoor living space know the rules. Of course, Do Not Feed the Alligators would mean don't get caught by one or you'll be dinner!