By: Brooke Copeland

Brackish Water

-Brackish water is water that is saltier than fresh water, but not as salty as sea water. It may result from mixing of seawater with fresh water.

- Many species of fish traded as freshwater species are actually true brackish species, for example mollies, Florida flagfish, and some cichlids such as chromides and black-chin tilapia. There are also several popular species traded purely as brackish water fish, including monos spp, scats, archerfish, and various species of pufferfish, goby, flatfish, and gar.

-The Baltic Sea is a brackish sea adjoining the North Sea.

-The Caspian Sea is the world's largest lake and contains brackish water with a salinity about one-third that of normal seawater.

-In the Black Sea the surface water is brackish.

Fresh Water

-Fresh water is naturally occurring water on the Earth's surface in ice sheets, ice caps, glaciers, icebergs, bogs, ponds, lakes, rivers and streams, and underground as groundwater in aquifers and underground streams.

- 3% of the Earth's surface is made up of fresh water.

- Fresh water is the water that humans drink

-Freshwater is defined as having a low salt concentration — usually less than 1%. Plants and animals in freshwater regions are adjusted to the low salt content and would not be able to survive in areas of high salt concentration.

-There are different types of freshwater regions:

Ponds & Lakes

Streams & Rivers


Salt Water

-Salt water is a geological term that refers to naturally occurring solutions containing large concentrations of dissolved, inorganic ions.

-97% of the Earth's water is salt water.

-Saltwater most commonly refers to oceanic waters.

-Saltwater is more dense or thicker than freshwater so things float more easily in saltwater.

-The ocean provides habitat for a wide variety of animals, some of which are flying-fish, sharks, narwhals, sting-rays, whales, tarpon, tuna, sardines and jellyfish.