Chandler Powell and Robert Irwin take centre stage if the Crocoseum at Australia Zoo in Queensland

Robert Irwin on His Dad's Legacy and How His Family Reacted to Him Swimming With Sharks (Exclusive)

Robert Irwin, 17, lovingly cradles his niece Grace Warrior, four months, in photos

Robert Irwin Swims With Massive Manta Ray to Kick Off 'Shark Week'