Ocean Fish
Saltwater Fish
noun
An ocean fish is simply an ocean fish. They also happen to be the most delicious kind of fish.
海魚 is often used in contrast with 川魚 (river fish), especially when talking about fish as food.
You might think this is all going to be on'yomi, which it can be, but we'd actually like you to focus on the kun'yomi reading うみざかな here. Using the on'yomi is also correct, but sounds formal and scientific, while うみざかな is much more colloquial, so try to remember this reading instead! You already know the individual kun'yomi readings for this, but do watch out for the rendaku.
海魚を食べる
to eat ocean fish
海魚をとる
to catch ocean fish
海魚をつる
to catch an 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.