no they don't have backbones
sharks have backbones and they are fish
Yes there are according to the 2009 report and also hamerhead sharks and copper sharks. It appears they dont need warm water either and mostly have attacked divers.
Animals that have backbones are considered vertebrates, while animals without are invertebrates. So sharks, having backbones, are vertebrates.
It is a vertebrate. They have backbones.
Sharks and their relatives have cartilage.
There are about 58,000 known species with backbones, these include; sharks, mammals, birds, amphibians, reptiles, rays and (some types of) fish.
No! They are made of cartilage.
clown fish,mudfish,catfish,seahorse
hamerhead
Sharks are vertebrates (they belong to the phylum Cordata), so they have a spinal chord. However they are also cartilaginous fishes (they belong the the class Chondrichthyes) meaning that their skeleton is made of cartilage instead of bone. They do have a cartilage sheath that surrounds their spinal chord which could be considered a spine. There could be a semantic debate over whether that constitutes a spine, but I for one think it does.
sharks dont have bones... their skeleton is made of cartilage
Yes, but they are different from other vertebrates in that their backbones are made of cartilage, like the rest of their skeletal structure.