Wetlands are areas that are saturated with water all the time or seasonally. Wetlands are often called marshes, bogs and swamps. They are found all over the world, except in Antarctica. Wetlands help provide food and homes to fish, amphibians, shellfish, insects, birds and other animals. They also clean our water by filtering out pollutants. Plus, they act as natural sponges and provide flood protection for our communities.