Elasmobranchs (sharks and rays)

Elasmobranchs are a group of cartilaginous fishes that include sharks, rays, and skates. They are characterized by flexible skeletons made of cartilage instead of bone, paired fins, and multiple gill slits. Sharks generally have a streamlined body and are active predators, while rays and skates have flattened bodies adapted for bottom-dwelling. Elasmobranchs play essential roles in marine ecosystems as predators and prey, helping maintain healthy ocean populations. They have evolved various features like sharp teeth and specialized senses to hunt and navigate their environments effectively.