Jay Flores and Katie Bland
Only 3% of the Earth's water is fresh. The majority of the Earth's freshwater in frozen in glaciers but the rest makes up ponds, lakes, and rivers. Freshwater can be divided into three zones, the littoral zone, limnetic zone, and the profundal zone. The littoral zone is closest to the shore and light reaches the bottom on the zone. It consists of many tiny crustaceans, flatworms, snails, frogs, and fish. The Limnetic zone is the layer of open water where photosynthesis can occur. The profundal zone is the deepest point of the body of water where no light reaches. Marine Biologists are scientists who study these different bodies of water.
The Baltic Sea
The Baltic Sea is the largest pool of brackish water.
The Caspian Sea
The Caspian Sea is the largest lake.
The Amazon River
The Amazon River empties such a large amount of freshwater into the Atlantic Ocean that it reduces the salt content of the sea for hundreds of miles.
Chesapeake Bay is the largest estuary in the United States.
When freshwater flows into a salt water marsh, a brackish marsh may occur.
Brackish Water Fish
Nearly three quarters of the Earth is covered by saltwater. Oceans make up 97% of the Earth's water. The ocean floor is so deep that almost 90% of the Ocean has currently gone undiscovered known as the "abyss".
The Pacific Ocean
The Pacific Ocean is the largest ocean and contains 30% of the Earth's saltwater.
The ocean is home to thousands of different fish species.
Great White Shark
The Great Barrier Reef is the largest living structure on Earth and can be seen from the moon.
The Pacific Ocean alone has over 25,000 islands.
An oceanographer studies the physical and biological aspects of the sea.