Pinnotheres Ostreum, commonly referred to as the oyster pea crab, has several synonyms. One of the most commonly used is Pinnotherea Ostreum, which is another spelling of the same name. Other synonyms include Pinnixa ostreum, which is a combination of the crab's family name and species name, and Pinnotheres pluriramis, which represents a related species. The term "oyster pea crab" is also often used interchangeably with the scientific name. These synonyms are important for scientists, taxonomists, and biologists, who use them to catalog and identify species accurately. Understanding the different names used for a species can also help with research, conservation, and management efforts.