Teleosts are a diverse group of bony fish that belong to the infraphylum Osteichthyes and are characterized by a range of advanced features, including a mobile jaw and a swim bladder that aids in buoyancy. They represent the largest and most varied group of fish, encompassing over 26,000 species, including familiar types like salmon, tuna, and goldfish. Teleosts are notable for their evolutionary adaptations, which allow them to thrive in various aquatic environments. Their evolutionary success is partly due to their efficient reproductive strategies and varied feeding mechanisms.