Marine and Freshwater Biomes

The aquatic biome is the largest of all the biomes, covering about 75 percent of Earth’s surface. This biome is usually divided into two categories: freshwater and marine.  Aquatic ecosystems include both saltwater and freshwater biomes.

Water makes up three-fourths of Earth’s surface and creates two of its biomes: the freshwater biome and the marine or saltwater biome. The freshwater biome includes ponds, rivers, streams, and other bodies of water with a little salt in them. The marine biome consists of the oceans, which contain plenty of saltwater. Within the ocean, coral reefs are the second kind of marine biome. Estuaries, coastal areas where salt water and fresh water mix, form a third unique marine biome. The ocean is the largest of the Marine Biome.