The foundation of the seas food chain is largely invisible countless billions of one celled organisms called phytoplankton saturate sunlit upper ocean waters worldwide. Covering 71 percent of the earths surface the ocean provides a magnificent variety of creatures each of these creatures occupies a unique position on the food web or trophic web which is composed of producers consumers and decomposers. A food chain in the ocean begins with tiny one celled organisms called diatoms which make their own food from sunlight shrimplike creatures eat the diatoms small fish eat the shrimplike creatures and bigger fish eat the small fish. This video for lucas millers hit im a mako shark provides a fast paced science lesson in the complexities of ocean food chains from the importance of sunlight to phytoplankton right . A food chain is a representation of the relationship between producers and consumers preys and predators within an ecosystem every food chain will have at its lowest level primary producers that are responsible and capable of producing their own food
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