system
Given the following post, respond as if you're commenting on Reddit:
human
How do large whales (Humpback, blue whales etc.) defend themselves when attacked?

So I read an article in a Danish news station, that for the first time it's been observed that a group of Orcas have attacked and killed a blue whale - something not thought as something they'd normally do. It was a group of up to 75 Orcas, and it took hours, but they still managed to kill and share the blue whale. It in itself is an incredible story, and raises many questions - but the one I was sitting back with was: How do large whales defend themselves? I've seen large mammals on land like Elephant defend themselves, but they seem to have some more directly defensive features.

Is it solely a question of size and the normally just don't get attacked?

Do they have any 'defensive weapons'? I.e. can their mouth, tail or something third be used to defend?

Something completely different?

Thank you in advance clever redditor :)
gpt
I distinctly remember hearing that the big whales simply outdive or outpace orcas in pursuit. Its why orcas generally only take the calves which dont have the necessary endurance to escape.

Additionally orcan can attack the flippers which obviously helps when they get close enough in the first place.