How many different species of chondrichthyes are there?

Chondrichthyes, which include sharks, rays, and skates, comprise around 1,200 different species. This group is characterized by their cartilaginous skeletons, as opposed to bony fish. The diversity within Chondrichthyes reflects a wide range of adaptations to various marine environments. Their species can be further classified into two main groups: Elasmobranchii (sharks and rays) and Holocephali (chimeras).