Humans eat a huge number of animals and plants from the sea. Sea meals can include fish, shellfish, and algae. Usually purchased either fresh or frozen from the supermarket, these seafood products have either been harvested from their natural environment or raised by humans in farms consisting of tanks connected to the sea or cages in the sea. The farming of sea animals and plants by humans is called aquaculture, which comes from the Latin, "aqua," for water and "culture," which means to grow, and therefore means something "grown in water." Aquaculture helps us to avoid depletion of sea resources by over-fishing, and it also helps us to produce enough food to feed the growing number of humans on earth. Fish farmers know the precise quality of the water used, and the quantity of animals they raise to sell. Fish farmers can also choose fish species according to a region's climate and the type of seafood commonly eaten by the people living in that region.

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