What are the environmental threats to blue crabs?



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    Blue crabs represent the most economically valuable fishery in the Chesapeake Bay as well as an important species in the estuary ecosystem. The record low number of crabs is thought to be mostly caused by overfishing, especially of female crabs, and pollution leading to habitat loss. Other factors include loss of food sources by eutrophication, or dead zones in the Bay, which creates algal blooms that rob the water of nutrients and oxygen. 

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