The killer whale is one of the most feared predators in the ocean and most would consider it madness to enter the water with one. But New Zealander Dr Ingrid Visser thinks differently - and by swimming with her beloved whales she has come to know almost all of them by sight. But there's been an unusual number of deaths recently and Ingrid is on a mission to find out what is going on. Her findings reveal disturbing new information about the health of our oceans.—BBC
Dr Ingrid Visser in New Zealand , who has devoted her life to studying the majestic but diminishing population of wild ORCAS . risks her life by swimming, watching and documenting the 200 that live in the waters nearby. She wants to find out why they are beaching themselves in large numbers and finds disturbing news about the health of our oceans and their pollutants.—Katherine Riser