Actinopterygii, commonly known as ray-finned fishes, is a diverse class of fish characterized by their bony skeletons and fins supported by thin, bony rays. This group includes familiar species like salmon, tuna, and goldfish. They inhabit various aquatic environments, from oceans to freshwater lakes, showcasing a wide range of shapes, sizes, and colors. These fishes are vital to ecosystems and human economies, serving as a primary food source for many animals and people. Actinopterygii are also important for recreational activities like fishing and aquarium keeping, making them significant both ecologically and culturally.