swellshark
... that the swellshark bends its body in a U-shape and sucks in water to double in size and avoid attacks from predators?
... that the <b id="mwCGg"><a class="mw-redirect" href="./Swellshark" id="mwCGk" rel="mw:WikiLink" title="Swellshark">swellshark</a></b> bends its body in a U-shape and sucks in water to double in size and avoid attacks from predators?