What is the difference bwtween teleosts and elasemobrache?

Teleosts are a diverse group of bony fish that belong to the class Actinopterygii, characterized by their advanced skeletal structures and swim bladders, which aid in buoyancy. Elasmobranchs, on the other hand, are a subclass of cartilaginous fish, including sharks and rays, characterized by their skeletons made of cartilage rather than bone. This fundamental difference in skeletal structure, along with variations in reproductive strategies and ecological roles, distinguishes the two groups within the aquatic ecosystem.