Sharks tend to have very large livers that help them float and survive for extended periods without food. A shark’s liver is comprised mainly of fats and lipids. Depending on type, it can weigh up to 25% of the shark’s total weight and take up almost 90% of its internal body cavity.
More about sharks:
- Several species of sharks are sensitive to magnetic fields. Scientists are working on ways to harness magnets to repel sharks from beaches. Scientists also theorize that a shark’s sensitivity to the Earth’s magnetic field may help it navigate the oceans.
- Most shark attacks have happened in water less than six feet deep.
- The shark skeleton is made of cartilage, not bone. In fact, there is not a single bone in a shark’s body.