Otaria Byronia, commonly known as the Byron sealion or southern sealion, is a species of sea mammal found in the southern hemisphere. There are several synonyms used for the name Otaria Byronia, including Otaria Ursina, Otaria Nigrescens, Otaria Antartica, and Otaria Paranensis. The seal is known for its distinctive features, including a large size, a muscular build, and a thick fur coat that ranges in color from brown to black. Sealions are known to be social creatures, often gathering in large groups on beaches and rocky shores. While these synonyms can be used interchangeably, it is important to recognize the significance of using proper terminology when discussing this unique species of seal.