As you can see, the pond is located at Bear Point, but the depth is different on the left and right sides of the large pillar.
Promenade side (left): Shallow/water level is below the belly Mt. Sahoro side (right): deep/water level up to the mouth
When they came to the right side where the water was deep, the bears were walking with just the toes of their large feet touching the bottom of the pond.
Are they standing on their tiptoes to poke their heads out of the water? Are you standing on your tiptoes due to buoyancy? I'm not sure, but it looks like it would be fun to walk around in the water ♪