I’ll agree that the diff in foreground is skewing it a bit. I’ll edit this because I think you mean 1.5-2m between the boat and bear. If the bear is normalish sized it should be about 1.5m(5ft) tall. The guy in the boat is probably similar but he is also standing on something at or below water level versus above it like the bear. Which also gives the illusion of the bear being bigger.

Polar bears change weight significantly throughout the year. So that can change what they look like wet as well. Their fluff will always be less.

The point I was trying to make… A gorilla’s strength is technically enough to lift a polar bear’s weight but it’s in the upper end of their strength. The bear is going to fight every step of the way and it’s not going to behave like an inanimate object. The bear is almost guaranteed to have one or two limbs on the ground at all times providing it leverage. Polar bears can lift approximately twice what a gorilla weighs. Add in its nearly 2x size advantage, 3-4x weight advantage, the thicker hide, ~10cm of fat insulation, 5-7cm claws, and carnivorous focused teeth…I don’t see it ending well for the gorilla.