Whales are huge, passive water mobs that spawn in the depths of the ocean. They are gentle giants and sing quite frequently, adding a calming atmosphere to the seas.
Whales have 25 hearts, and will peacefully swim around, making pulsed calls as they go along. In addition to this, they have the splendid habit of gracefully jumping out of the water and landing back in. They do not react to the player in any way, so it is quite fun watching them.