Old Men of the River
A Dance with Dragons
When the Shy Maid sails down the Rhoyne at Ny Sar, they see an exceptionally huge horned turtle, which comes to the surface and bellows at them. Tyrion judges it to be bigger than their boat. Ysilla says they are blessed to see it, and Yandry declares it to be the Old Man of the River, not just any turtle but the actual god that gives its name of the turtles.