iA sand tiger shark can gulp air at the surface and hold it in its stomach. That gives it enough buoyancy to hover in midwater. To identify one, look for a mouthful of thin teeth that can protrude past the lips.
iiA sand tiger shark can gulp air at the surface and hold it in its stomach. That gives it enough buoyancy to hover in midwater. To identify one, look for a mouthful of thin teeth that can protrude past the lips.