I mean... KE still COULD be included since they COULD move relatively quick in a sense (about speeds comparable to a slow car), not sure if they've ever used it to defensively ram threats though:
en.wikipedia.org
en.wikipedia.org
"The traveling speed for blue whales ranges from
5–30 kilometers per hour (3.1–18.6 mph)." (which is 8.3333... m/s at max)
"In March 2014, a commercial whale watch boat operator recorded an incident involving a group of orcas harassing a blue whale in
Monterey Bay.
The blue whale defended itself by slapping its tail."
(granted, just after that sentence there's another account of orcas killing an 18-22m long blue whale, but still worth mentioning)
So, using the travelling speed and the max mass for blue whales (173 to 199 tonnes)... 1/2 x 173000 or 199000 x 8.333 = 720804.5 to 829133.5 joules aka 7.208045x10^5 to 8.291335x10^5 joules... which yeah still puts them at lower end of 9-B Wall level so honestly there's not much difference but no idea how fast or heavy the whale's tail slap is so welp.