Sharks Lack Bones, Their Skeletons Are Made Entirely Of Cartilage

This cartilaginous skeleton is lighter and more flexible than bone, allowing sharks to be incredibly agile predators. It also makes fossilization rare, as cartilage decays much faster than bone.

Source

https://en.wikipedia.org/wiki/Shark_skeleton

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Published: March 29, 2026
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Fascinating Biology Ocean Animals Shark Cartilage Skeleton Marine Biology Fish Predator

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