Killer whales (also called orcas) are apex predators, meaning they are at the top of their food chain. They feed on fish and squid like other odontocetes (toothed whales) do, but will also target ...

If killer whales disrupt Arctic whale populations ... hoping to mitigate the long-term effects of climate change on the Arctic food chain. A key part of this effort involves collaborating with ...

Predators at the top of a marine food chain 130 million years ago ruled with more power than any modern species, McGill research into a marine ecosystem from the Cretaceous period revealed.

To steer clear of the roving killer whales, researchers say, great white sharks have fled their former favorite haunts, causing cascading effects up and down the food chain. Populations of the ...

To steer clear of the roving killer whales, researchers say, great white sharks have fled their former favorite haunts, causing cascading effects up and down the food chain. Populations of the ...

As Arctic temperatures rise, species like killer whales are venturing further into ... are at a higher level in the food chain and carry significantly more contaminants. Similarly, with decreasing ...