Snow Inhabitants

I think penguins would be a good fit for cold biomes. They could spawn in cold oceans near icebergs and icy shores, living in small groups and wandering in packs across the ice, as was suggested in an early mob vote. Penguins could be fed fish and bred using fish. If you drop a fish on the ground, a group of penguins will gather around it. We could also add an animation where a penguin holds a fish in its paws and eats it, like a panda eating bamboo. We could also add a mechanic where boats move slightly faster if you put a penguin in them. This would make them not only atmospheric but also useful mobs. I'd also like to slightly expand the drops of some existing animals. For example, goats could drop horns, white wool, and goat meat, which can be cooked. Polar bears could drop white fur or wool, as well as bear meat, which can also be cooked. As for other existing mobs, I would give the creeper a white snowy variant, and add snow zombies riding polar bear zombies with spears or swords in glacial peaks.