11.   The disputed zone in the Yellow Sea is a rich crab fishing ground claimed by both Koreas as territorial waters.

12.   The disputed zone, a rich crab fishing ground, is claimed as territorial waters by both Koreas.

13.   The disputed zone in the Yellow Sea is a rich crab fishing ground claimed by both Koreas as their territorial waters.

14.   The naval skirmish occurred in a rich crab fishing ground that is claimed by both Koreas.

15.   The military confrontation entered its sixth day Sunday when seven North Korean warships sailed into what both Koreas claim as territorial waters, a rich crab fishing ground.

16.   The zone is a rich crab fishing ground.

17.   The zone, a rich crab fishing ground, is also claimed by South Korea as its territorial waters.