The fish, really. You'll find them in the rivers around the Heaven's too. Not sure if they belong to anyone, but I suppose a local god of sea and rivers might be extending their protection to them.

[ He pokes the ice with his heel as if testing the strength of the ice. One time he stomps hard in an attempt of scaring the fishes away- it doesn't work, they flock as if trying to insult them

Maybe because there is a small crack showing up under his foot. ]