Killer whales are the only natural predator of baleen whales—those that have "baleen" in their mouths to sieve their plankton ...

Pack-ice killer whales are highly social creatures ... Typically, kilowatts are quiet when they're searching for prey because sound travels incredibly well in water. And so they could alert ...

Learn more about how baleen whales split into two groups — fight or flight — and how these groups determine how loud they sing.

New research finds some baleen whale species call at such deep frequencies that they're completely undetectable by killer whales, which cannot hear sounds below 100 hertz. These also tend to be the ...