YOU SAID:

There are plenty of fish in the sea.

INTO JAPANESE

海には魚がたくさんあります。

BACK INTO ENGLISH

The sea is full of fish.

INTO JAPANESE

海は、魚でいっぱいです。

BACK INTO ENGLISH

Sea is full of fish.

INTO JAPANESE

海は魚がいっぱいです。

BACK INTO ENGLISH

Sea is full of fish.