cause they dont!
!
swim bladder.
sharks, skates, and rays have skeletons made of cartilidge
Yes
No they are made of cartilage
same as other sharks: mackeral skeletons kingfish skeletons etc. be sure to make a good berley trail!!
Chondrochthyes, i.e., the cartilagenous fishes, like sharks, posses cartilagious skeletons.
Neither. Sharks are primitive fish, with cartiledge skeletons.
Sharks and jawless fish have cartilaginous skeletons, meaning their skeletons are comprised of cartilage.
Bone. The same as yours. Sharks have cartilaginous skeletons, but whales are mammals, with skeletons like humans or dogs or elephants.
Sharks and Stingrays both do not contain any bones in their bodies. All invertebrates have no "bones". Vertebrates have "bones". Read a book on biology. Sharks, dogfish and rays are all vertebrates but have skeletons composed of cartilage not bone. ---- Wtf... Sharks have sharp, pointy teeth. What are teeth made out of? Bones! Sharks have bones.
SHARKS AND RAYS HAVE CARTILAGE SKELETONS,WHICH MEANS THEY ARE VERY FLEXIBLE. I THINK.(peytonallentranum)
Sharks do not exactly have back bones, their skeletons are cartilaginous. And their weight is supported by the water in which they swim.