Polar Bear

"Bears: adorable at a distance. This is true in Minecraft, just as it is in real life. They may look huggable and furry, but they are full of teeth, and not too fussy about what, or who, constitutes a meal."

- Marsh Davies

Polar bears are neutral mobs that will only spawns in cold biomes.

Spawning
Polar bears are found in ice plains, ice mountains and ice spikes biomes, in groups of up to four. If there is a group of two or more there is always only one parent, and the other one is a cub.

Drops
When killed, a polar bear has a $3/4$ chance to drop 0–2 raw cod, and a $1/4$ chance to drop 0–2 raw salmon. These are always raw, even if the polar bear is on fire when it is killed.

Like other baby animals, killing a baby polar bear yields no items or experience.

Behavior
Polar bears can exist in a passive, neutral, or hostile state. The cubs are passive; adults are neutral. They will become hostile towards the player if they get too close to their cubs (this does not seem to happen as fast on easy difficulty). If a cub is attacked, all adults within a 41×21×41 cuboid will become hostile towards the attacker, regardless of difficulty (although in peaceful difficulty, their attacks will do zero damage to players). Attacking an adult who is within a 16×8×16 cuboid of a cub will also provoke other adults within a 21×21×21 cuboid of the attacked adult. Polar bears can be accidentally provoked by other mobs.

Polar bears attack by rearing on their back legs and then mauling down on the attacker with their front paws. Their swimming speed is faster than the player's, making them difficult to get away from if they are attacking.

Polar bear cubs' growth cannot be sped up.

Data values
Polar Bears have entity data associated with them that contain various properties of the mob. Their entity ID is.

Trivia

 * According to Jeb, polar bears were added after his son, Björn, was born. Coincidentally, "björn" is Swedish for "bear".