Watch as sea otters use the rocks in the enclosure as tools to break open shellfish.<br /> <br />Juno, Lincoln and Uni Sushi couldn’t wait to get into their fishy snacks.<br /> <br />In the video, the otters bangs the shellfish against rocks multiple times before eventually opening it and enjoying the tasty treat. <br /><br />The three southern sea otters reside at the Oregon Zoo in Portland, USA.
