HSK V7-9
Correct

海域

/ hǎiyù / 
Strokes

Definition

sea area/territorial waters/maritime space

Example

As a Noun
sea area; maritime space
1
Nánhǎi
南海
hǎiyù
海域

South China Sea waters

2
Hǎiyù
海域
jiānshì
监视

sea surveillance