The term "lady crab" refers to a female crab which typically has a wider abdomen than a male crab. Synonyms for "lady crab" include "she-crab," "female crab," and "dame crab." Other words that can be used to describe a female crab include "matriarch," "queen," and "lady boss." The term "jenny crab" is also sometimes used to refer to a female crab. While male and female crabs may differ in physical appearance, both genders play important roles in the ecosystem and are equally valuable for their contributions to marine life.