Genus Callinectes, commonly known as blue crabs, is a diverse group of crabs found in the oceans and estuaries of North and South America. There are several synonyms, or alternative names, that refer to this genus, including Callinectes sapidus, which is the specific name given to the most widely recognized species of the blue crab. Other synonyms for Genus Callinectes include Cancer borealis, Cancer fastigiatus, and Lupocarcinus egyptiacus. While these names may not be as commonly used as blue crab, they are still important to know in the field of marine biology and can be useful when identifying and cataloging different species.