Generally, the aquatic biome is considered one biome that is further broken into habitats, such as marine and freshwater.

Generally, the aquatic biome is considered one biome that is further broken into habitats, such as marine and freshwater. The aquatic biome is the largest on earth. Occasionally though, coral reefs, estuaries, lakes, and others may be referred to as a type of aquatic biome.

For example, coral reefs are found in warm, shallow waters and are dominated by corals. Fish, invertebrates, sea urchins and other fauna are found in coral reefs.

Wetlands are another example of an aquatic biome. They are standing bodies of water such as marshes and swamps. Plants are well adapted to the abundance of water as are the animals typically found in wetlands, such as ducks and amphibians.

One more example of an aquatic biome is the open ocean, which is very large, can be very deep, and is sparsely populated. Plankton, algae, fish, tube worms, and seaweed are found in the open ocean. The ocean is typically divided into zones.