The sea lion fin has been used as a handle for many swords across Refaim. After the spike in the amount of sea lions death, the Guardians council decided to banish anyone that harms sea lions. There is still a large black market for the fins of sea lions and now the Sea Lion Bandits are looking for more fins. Bring the Sea Lion Bandits the specified amount of fins and they will reward you with a Sea Lion Fin Sword Craft Book.