Carbon is found in water and sediment of lakes, rivers, streams, estuaries, the deep ocean, groundwater and aquifers, ice caps, and wetlands . Carbon in these aquatic systems can be classified as either dissolved organic matter, particulate organic matter and inorganic matter or living organisms like bacteria, diatoms, dinoflagellates, fish, fungi, aquatic plants, zooplankton, algae, crayfish, mussels, jellyfish, sea lions, walrus, sharks, whales, turtles, etc.
