Kid's Planet:
The protection that the killer whales use is that they travel in packs so they can protect eachother from danger. Also that since that their big they can fight and not be push around so that they kill other animals.

Marinebio:
The killer whales attack any animal that attecks them so that their strong and fierceful to protect themself. Also that in pods they are much stronger as one and able to take down any other animal that gets in their way.

CMS:
These whales are procted by their size and wieght to other animals so they kill them to show that they protected themseleves. When travel with lots of whales their kind their unbeatable to any whale or human that trys to kill them.