2. A shark maintains his buoyancy because a shark was the same amount of force pushing awards as gravity is pulling is downwards. So instead of sinking it floats. I know that didn't make a lot of sense but seriously, watch Mark Rober and you will know everything!!! (unlike me, a freshman)
3. P.S. If you want to learn more about buoyancy, I suggest you watch the balls in the liquid sand video
