their on. >> it's an incredible skill taught by one generation to the next. this morning maga's hunting class is in session. she's working with her grandchildren on their stranding technique. >> she's a great teacher. she's really proficient and professional. >> today's challenge, the young calves are to swim into the shallow, grabbing clumps of seaweed. a practice run like this is critical. if they master this skill, they'll never go hungry, but one wrong move and they could beach themselves and die.