Wait how many bones do whale sharks have? I thought they were cartilaginous?
They are cartilaginous. I’m guessing this question is in response to today’s shark fact, where they were referred to as vertebrates (feel free to correct me if that’s wrong).
Sharks and other cartilaginous fishes do fall into the vertebrate category even though they don’t have bones, because the classification is based on the presence of the vertebral column (backbone/spine). Sharks do have spines, they just aren’t made out of bones.