ELI5: Explain Like I'm 5

Elasmobranch

Elasmobranch is a big word that refers to some animals that live in the ocean. These animals are fish that have a cool, tough skin that is made out of cartilage instead of bone like humans have. They also have some pretty cool features like sharp teeth and powerful tails, which help them swim through the water really fast.
Some of the most famous elasmobranchs include sharks, rays, and skates. Sharks are really big and have lots of sharp teeth that they use to catch their prey. Rays and skates are smaller and have flat bodies that help them glide through the water. All elasmobranchs are pretty cool animals that live in the ocean and play an important role in keeping the ocean ecosystem healthy.