D'orbgnys Slider spawn in rivers and maintain and are also tamed with sardines, when they are in the water they can hunt fish for long periods, they will collect all the loot dropped by them and at some random time will return to you, don't worry if they If you stray too far and disappear into the seas and rivers, at some point it will find its way back to you and reward you with plenty of fishing loot! Only after returning the items to the owner will they be able to go fishing again, and you can stop them from moving away from you by putting on a leash!