Shark fact - 1
Sharks don't got no bones
Sharks use their gills to filter oxygen from the water. They are a special type of fish known as "elasmobranch", which translates into 'fish made of cartilaginous tissues' — the clear gristly stuff that your ears and nose tip are made of. This category also includes rays, sawfish, and skates. Their cartilaginous skeletons are much lighter than true bone and their large livers are full of low-density oils, both helping them to be buoyant.