The largest river that combines the Somnus and Ati rivers. Gatus is located at the head of the river where the other two meet.
This river is huge, think Misssissippi huge, it is at least a mile and a half wide at parts, some parts even wider. The mouth of the river by Gatus is at least 2 miles wide. The river is deep but slow moving the further west you go to the coast. Not many have tried to discover possible riches at its bottom.
Some of the creatures from the slurry sea have been able to swim up the river and live near the bottom of the river. Previous Barons have let them stay as the locals all know to watch out for them and how to avoid being eaten. They also provide another level of security to the city of Gatus.