Aquatic biomes

thumb|upright=1.3|Mangroves are hardy shrubs and trees that thrive in salt water and have specialised adaptations so they can survive the volatile energies of intertidal zones along marine coasts.

portion of a continent that is submerged under an area of relatively shallow water known as a shelf sea

any water that is neither close to the bottom nor near the shore

part of a sea, lake or river that is close to the shore

ecological region at the lowest level of a body of water such as an ocean or a lake, including the sediment surface and some sub-surface layers

thumb|388x388px|An example of a mountain lake ecosystem Hydrobiology is the science of life and life processes in water. Much of modern hydrobiology can be viewed as a sub-discipline of ecology but the sphere of hydrobiology includes taxonomy, economic and industrial biology, morphology, and physiology. The one distinguishing aspect is that all fields relate to aquatic organisms. Most work is related to limnology and can be divided into lotic system ecology (flowing waters) and lentic system ecology (still waters).

part of the ocean

part of the pelagic zone

type of ecosystem

deep zone of an inland body of freestanding water, such as a lake or pond, located below the range of effective light penetration