A pond is a body of water smaller than a lake. Ponds support a very wide range of wildlife: ducks, turtles, swans, small fish, and frogs can live in a pond. Usually, in most ponds sunlight can reach to bottom. In some cases ponds do not last all year round. This type of pond is called a vernal pond, or ephemeral, seasonal, or temporary wetlands. These types of ponds do not have any fish. Some ponds are now getting polluted because of humans.