The three aquatic ecosystems are Freshwatwer, Brackish Water and Salt Water. Each have different traits and characteristics that help sustain the life that surrounds them.


Freshwater ecosystems take up only 3% of the world`s water. Most of it is either frozen in glaciers and the rest of it is found in lakes, ponds, rivers and streams. These bodies of water have very little salt content and together hold about 40% of all known fish species. Freshwater ecosystems provide for our drinking water, sanitation and agriculture.

Brackish Water

Brackish water is sort of a "midway point" between freshwater and salt water. It contains more salt than freshwater but not as much as seawater. Most places containing brackish water are where freshwater meets an ocean. The Thames River in London is an example of a brackish body of water along with The Baltic Sea.


Saltwater ecosystems cover over 70% of the planet and make up for about 97% of the Earth`s water. It differs from the other two ecosystems because of its high content of salt. Saltwater ecosystems consists of Oceans and lakes like the Pacific Ocean and the Dead Sea.

By: Johnny Pache and Hayden Sanders