From A Wiki of Ice and Fire
The Shivering Sea lies north of the eastern continent, Essos. The narrow sea flows into it. The island of Ibben can be found within it. According to non-canon sources, it is inhabited by many whales.
References and Notes
- A Dance with Dragons, Map of the Free Cities
- So Spake Martin. Ibben and Armor. (November 9, 2002) http://www.westeros.org/Citadel/SSM/Category/C91/P15/