The Tulkun is a whale-like creature native to Pandoras ocean. They are similar to Earths whales and possess a form of sentience with their own language, laws, and philosophy which makes them capable of bonding with Navi in a more spiritual way than other animals. Each member of the Metkayina Clan forms a life-long bond with a tulkun as a spirit brother/sister. Once violent creatures who continually warred with one another, they are now completely pacifistic, refusing to kill even to defend themselves. As such they banish those who commit violence. They are introduced in Avatar: The Way of Water, in which humans have begun hunting them to harvest their brain enzymes for creating anti-aging remedies called amrita. Jake Sullys son, Lo'ak, bonds with an outcast tulkun named Payakan after he is banished for killing the whalers who killed his mother.