Claspers are specialized structures found in males of certain animal species that are used to transfer sperm during mating. These structures are also known as intromittent organs, copulatory organs, or genitalia. In some animal species, such as sharks and rays, claspers are used for feeding as well as mating. Other synonyms for claspers in different animal groups include hemipenes in snakes and lizards, aedeagi in insects, and pedipalps in arachnids. Understanding the various names and functions of these structures can provide valuable insights into the mating and reproductive behavior of different animal groups.