Why chondrichthyes have ventral mouth?

Chondrichthyes, a class of cartilaginous fish that includes sharks and rays, have a ventral mouth positioned on the underside of their bodies. This adaptation allows them to effectively feed on prey from below, enabling a stealthy approach to ambushing prey near the ocean floor. It also facilitates better suction feeding and improves their ability to capture bottom-dwelling organisms. Overall, the ventral mouth position enhances their predatory efficiency in diverse marine environments.