Do sharks have backbones are sharks vertebrates or invertebrates what do sharks have in their back how do sharks bend their tail so bendly how are they so flexible with their tail are they cute?

Answer 1

Sharks do have backbones, making them vertebrates. Their skeletons are made mostly of cartilage and not actual bone, being of a more ancient classification of fish in evolutionary terms.

Whether something is cute or not is subjective, however sharks aren't exactly an animal that have the head/body porportions similar to what humans usually see as cute, they don't look neotonous (like babies).