In chapter 84 of Kengan Asura, Karo remembers his fight with a giant sperm whale. I want to calculate the power of this creature.
To begin with, let's find the height of the head of a real sperm whale.
Sperm whale length = 16 meters = 1845 pixels;
Nose width = 127 pixels = 1,101 m;
First, let's find the KE and PE of a real sperm whale.
Male weight = 50 tons;
The sperm whale is able to jump out of the water at a distance of 6/13 of its body, based on the video in the comments. He does it in 0,5 seconds.
PE = 50000 * 7,38 * 9,81 = 3619890 Joules = 9-B;
KE (Jump) = (50000 * 14,76^2)/2 = 10816000 Joules = 9-A;
Now let's calculate the size of the sperm whale that Karo fought with.
Karo's height = 2,06 meters = 65 pixels;
Sperm whale nose = 350 pixels = 11,09 meters;
11,09/1,101 = x10,07 larger;
Sperm whale weight = 50 tons;
The weight of a giant sperm whale = 10,07^3 * 50000 = 51057367 kg = 51057 tons;
GPE:
Head height = 11,09 m;
Length = 161 m;
GBE = 51057367 * 9,81 * (161/2) = 40320258006 joules = 9,63 Tons of TNT (High 8-C+)
KE:
KE (Jump) = (51057367 * 148 * 148)/2 = 559180283384 Joules = 133 Tons of TNT (8-A);