Ocean Fish
Saltwater Fish
noun
An ocean fish is simply an ocean fish. They also happen to be the most delicious kind of fish.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
Some people also use the kun'yomi readings, but it's much less common, and generally considered colloquial.
海魚をつる
to catch an ocean fish
海魚をとる
to catch ocean fish
海魚を食べる
to eat ocean fish
サケは海魚ですか？それとも川魚ですか？
Is salmon a saltwater fish? Or is it a freshwater fish?
海魚はペットに出来ますか？
Can sea fish be pets?
スキューバダイビングで海の中に行くと、色々な海魚やクラゲを見ることができます。
If you go into the sea by scuba diving, you can see various sea fish and jellyfish.