PCB pollution threatens to wipe out killer whales
10 Orcas Facts – MAYA BLEU
Apex Predators and a Healthy Planet • Georgia Strait AllianceGeorgia Strait Alliance
Orcas vs great white sharks: in a battle of the apex predators who wins? | Science | The Guardian
Orca - Wikipedia
Killer Whale - Food Web
The orca shames us all, food-chain wise; humans and pigs are on the same level – The Context Of Things
For declining orcas, food is fate | Encyclopedia of Puget Sound
Killer Whale - Food Chain
Arctic Ecosystem: Description, Food Chain, and Animals | Earth Reminder
Orcas: Facts about killer whales | Live Science
What eats sharks? - Save Our Seas Foundation
Is it true that there is nothing above orcas in the food chain? - Quora
Get to know the Salish Sea orcas - David Suzuki Foundation
Fascinating Orca Facts: Dive Into The World Of Killer Whales
Shark-Liver-Eating Serial Killer Whales Lock Down South Africa's Coast
What's Killing Killer Whales? Chemistry Article for Students | Scholastic Science World Magazine
Why Orcas Are the Ocean's Apex Predator
What is at the top of the marine food chain? - Quora
Killer Whale | NOAA Fisheries
Up to HALF of the world's killer whales could be killed in the next 50 years | Daily Mail Online
