Polar Bear is a neutral mob that spawns in snowy plains, ice spikes, frozen oceans, and deep frozen oceans. It is a large, bear-like creature that can be either passive or hostile, depending on the situation. Polar Bears drop 0–2 raw cod or 0–2 raw salmon when killed. Polar Bears cannot be bred and do not produce any additional resources. They spawn naturally in cold biomes and often appear in small groups, sometimes with a baby Polar Bear.

Baby polar bears are always passive, but adult polar bears become hostile if a player approaches or attacks a baby. If attacked, an adult Polar Bear will chase and attack the player. When swimming, polar bears move fast in water, making them dangerous when encountered in frozen ocean biomes. They can also be leashed with a lead, allowing players to transport them.