Subclass Teleostei is a taxonomic category that includes more than 30,000 species of bony fish, known for their advanced respiratory system and efficient locomotion. Synonyms for this subclass include Teleosts, Teleosteans, or simply bony fish. Other related terms include Actinopterygii, the class of ray-finned fish, which is also a subgroup of Teleostei. Another related term is Ostariophysi, a subclass of Teleostei that includes the majority of freshwater fish species, such as catfish and carp. Understanding and using these synonyms can help biologists and researchers in better communicating their findings and research about these fascinating aquatic creatures.