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Marine Biomes

Home | Freshwater Biomes | Marine Biomes | Aquatic Biome Quiz


Marine biomes make up the largest percentage of aquatic biomes on Earth. Unlike freshwater biomes, these biomes involve a medium to high percentage of salt in the water.

These biomes are extremely important to how our Earth currently functions. Marine biomes supply much of the world's oxygen through algae plants. They also take in gigantic amounts of carbon dioxide from our atmosphere. Without these amazing biomes, humans would have difficult breathing!

Marine biomes include oceans, coral reefs, and estuaries. In this section of the web site, you will learn more about each marine biome. After reading this page and the freshwater biome page, you will be ready to take the Aquatic Biome Quiz. Remember to read carefully!

Ocean biomes are the largest of all the biomes. Because they cover such a large region, they are divided into zones. There are four ocean zones: intertidal, pelagic, abyssal, and benthic. Each biome has a different set of species that have adapted to that environment.

The intertidal zone is most commonly know as the tidal zone. This is the area where the ocean meets the shore. This zone changes greatly throughout the day, depending upon the ocean's tides.

The pelagic zone is more commonly known as the open ocean. It is the farthest area from the shoreline. The temperature of this zone changes frequently due to the constant mixing of cold and warm ocean currents.

The area below the pelagic zone is called the benthic zone. This area goes all the way to the bottom of the ocean floor. In this zone, as the water gets deeper, the temperature gets cooler and the ocean gets darker.

The deepest zone is called the abyssal zone. This zone includes mid-ocean ridges. Mid-ocean ridges are the spreading zones between the techtonic plates. Here you would find high oxyen content, little light, high pressure, and large amounts of hydrogen sulfide and other various minerals.

Click on the picture below to learn more about oceans!


Coral Reefs
Coral reefs are usually found in shallow, warm waters. They are found along continents, islands, and atolls. Coral reefs are made of algae and tissues of animal polyp. These areas tend to be poor in nutrients, however the coral gets its nutrients from the algae.

Click on the picture below to learn more about coral reefs!

coral reef

This biome is unique because it involves both freshwater and salt water. In this area streams or rivers connect to the ocean. Species that live in this biome have to be able to survive in both types of water.

Click on the picture below to learn more about estuaries!


Click on the navigation bar above to learn about the different biomes.