Bear

Bears are dangerous neutral mobs that are 50% hostile when being looked at. They also can be tamed, but are kind of impossible tame due to their dangerous hostile behaivor. They need raw fish to tame, and can be healed with any kind of meat. However when tamed, they won't follow the player but will just protect around the players bed from any hostile mob that if near the players space. Female bears are hostile toards the Player. They will deplete 9.

Behavior
They are basically considered hostile mobs when being looked at, and can cause serious damage. They can also attack you if you attack them as well. Bigger ones have babies, and can become hostile if you attack or are near their babies.

Taming
Bears can be tamed with Raw Fish, and any kind of meat. But however you will need protection when you do it, because adult bears are dangerous neutral mobs, and can ever attack if being looked at. However you also can hold the fish up in a non-threatening manner as well, and that will lure them toward you without attacking you.

Spawning and Farming
Spawning

Bears spawn in Forest, Taigas, Snowless Taiga biomes, but rarely in the Plains. They can be spawned from a spawn egg as well.

Farming

You can farm bears by digging a simple hole by 3 blocks tall in the ground, and two bears have to be in the hole. After a while, baby bears will be spawned as long as there is 2 bears in the hole. Then use a lead to pull them out.

Trivia

 * They are basically hostile mobs, and are extremely dangerous. Due to the conditions of being looked at, provoked, and even when near them. But they won't when you hold fish, and when tamed by The Player.
 * Female bears are hostile mobs. But babies and male bears are slightly, unless with babies.