Fish are vertebrates,which means they have backbones. Whilemost fish have a backbone,some don. The spine is one of the most vital structural components fish have. It protects their soft organs and spinal cord,helps them swim,and attaches to their muscles.
People also ask
Do tuna fish have backbones?
Yes, tuna fish do have backbones, and indeed, they are classified as vertebrates. This is a large ocean fish with a solid skeletal structure. The bottom line is that the only type of fish out there which is an invertebrate without a backbone is the hagfish.
What is the purpose of a backbone in a fish?
The main purpose of a backbone and a skeleton for that matter is to support and protect vital organs, muscles and other body parts of the fish. Just like humans, fish need to support their bodies and protect all their vital organs with their skeleton.
Do starfish have a backbone?
Even though a starfish is an invertebrate, they do have a kind of a skeleton but not a backbone like all fish, except for the hagfish, do. Their skeleton is their body, which is composed of calcium carbonate plates. This is their endoskeleton and can take on a variety of forms like granules or spines.
Do Hagfish have a backbone?
The hagfish are the only classified fish type that do not have a backbone but possess a skull. Hagfish belong to the class Myxini and the order Myxiniformes, having the shape of an eel. Most people refer to it as the slime eel. Hagfish do not have backbones, but they do possess rudimentary vertebrae.