Chondrichthyes is divided into two subclasses: Elasmobranchii (sharks, rays, and skates) and Holocephali (chimaera, sometimes called ghost sharks).
The Chondrichthyes, because of sharing common origin, all share particular features.
The Ta'yichiut enslaved Temьjin, but he escaped with help from a sympathetic captor, the father of Chilaun, a future general of Genghis Khan.