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        | Nourishment level in a food chain Algal produces constitute the lowest level followed by herbivores and a series of carnivores at the highest levels. |  | 
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        | Animals and bacteria that depends on the organic compounds produced by other animals and plants as food. Organism not capable of producing their own food by photosynthesis |  | 
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        | A group of interrelated food chains. |  | 
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        | An abundance of nutrients |  | 
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        | Formation of organic compounds from inorganic substance using energy derived form oxidation |  | 
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        | Areas such as the middle of subtropical gyres where there are low levels of biological production. |  | 
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        | Amount of organic matter synthersized by organisms from inorganic substances with a given volume of water or habitat in a unit of time |  | 
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        | pertaining to the ocean bottom |  | 
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        | Animal that live buried in the soft substate |  | 
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        | Layer that extends from the surface of the ocean to a depth where enough light exist to support photosynthesis, rarely deeper than 100 meter. |  | 
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        | Light produced in living organisms by chemical reaction. Found in bacteria, phytoplankton and metazoans |  | 
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        | The benthic enviroment between 4000 and 6000 meter |  | 
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        | The passage of energy materials from producers through a sequence of herbivores and carnivores |  | 
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 | Definition 
 
        | Asynbiotic relationship in which one organism benefits at not expense to its host. |  | 
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        | Term 
 | Definition 
 
        | Plant or bacterium that can synthesize organic compounds form inorganic nutrients |  | 
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        | Term 
 | Definition 
 
        | Open ocean enviroment divided into the neritic province(water depth 0 to 200 meter) and the oceanic province (water depth greater than 200 meter) |  | 
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        | Term 
 | Definition 
 
        | Pelagic animals such as adult squids fish and mammals that are active swimmers to the extent they can determine their position in the ocean by swimming |  | 
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        | Any loose material produced directly from rock disintegration. Material resulting from the disintegration of dead organic remains. |  | 
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        | Total weight of the organisms in a particular habitat, species or group of species |  | 
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        | Animals that live on the ocean bottom either attached or moving freely over it. |  | 
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