Q: Lacking a bony endoskeleton, sharks, rays, and ratfish belong to what group of fish?


Read this paragraph and choose the correct option from the provided answers:

Cartilaginous Fish Cartilaginous fish include sharks, rays, and ratfish. Their endoskeleton is made of cartilage instead of bone. They also lack a swim bladder. However, they have a complete vertebral column and jaws. They also have a relatively big brain. shark.

 Choices:

- invertebrates

- crustaceans

- freshwater fish

- cartilaginous


A:
cartilaginous