Honest no joke!
I actually witnessed a giant squid attacking a whale in the late 60's
I was in the merchant marine on a boat called Baron Belhaven and we were heading home from Australia via Cape of Good Hope.
We were at off the coast of Africa close to Senegal but well out to sea when the 2nd mate saw a whale and said "That poor beast has huge lumps on it" We both grabbed binos and saw that the "lumps" were really the tenticles.
The squid was underneath the whale trying to drag it down and at times the tenticles would stretch out wildly. Most of the time they were tightly around that whale.
Unfortunately shipping companies do not allow their ships to persue unusual marine activity and we had to carry on on our way north.
I often wonder who won the desperate fight!