The Arctic Ocean is a cold and beautiful sea.

The South Polar Ocean is the coldest sea on Earth.

I have visited the Ionian Sea.

The Bohai Sea is one of the important sea areas of China.

I would like to visit the Dead Sea someday.

Sea turtles play an important role in the marine ecosystem.

This sea urchin is fresh and delicious.

This restaurant offers fresh seafood.

I want to go to see the Yellow Sea.

I have been to Haikou.