Then hippo by default 100%. The giant squid evolved under the immense pressures of the deep, it would die immediately if brought near the surface. Even if it didn't, it's relatively slow moving as far as animals go, again, evolved for the dark, cold deep where conserving nutrients is paramount to all else.
He probably ment shallow waters for hippo to stand any chance
Then hippo by default 100%. The giant squid evolved under the immense pressures of the deep, it would die immediately if brought near the surface. Even if it didn't, it's relatively slow moving as far as animals go, again, evolved for the dark, cold deep where conserving nutrients is paramount to all else.