Classification of Class Chondrichthyes | Zoology
In this article we will discuss about the classification of class chondrichthyes. 1. The class includes sharks, rays and chimaeras. They are mostly predaceous and marine. 2. The skin is tough, possesses minute placoid scales and mucous glands. 3. Skeleton cartilaginous and notochord persistent. The vertebrae are complete and separate. 4. The median and paired fins are supported by cartilaginous [...]