skeleton Animals Biology Oceanography Science & Art 

Preserving a Soft Skeleton: Backs without Bones

By Sebastien Enault What are shark skeletons made of? The skeleton of modern sharks, rays, and skates consists of cartilage, a connective tissue that is lighter and more flexible than bone. Most people closely associate the skeleton with bone, and are familiar with the skeletal structure of many ancient and modern vertebrates, which are beautifully described in a vast number of anatomical works and frequently displayed in most natural history museums. However, while sharks and rays are very popular in aquariums around the world, few people actually know what their…

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