YOU SAID:
Narwhals swim in oceans, and my brother eats the ocean
INTO JAPANESE
ナルワールは海で泳ぎ、兄は海を食べる
BACK INTO ENGLISH
Narwar swims in the sea, my brother eats the sea.
INTO JAPANESE
ナルワールは海で泳ぎ、兄は海を食べる。
BACK INTO ENGLISH
Narwar swims in the sea, and my brother eats the sea.
INTO JAPANESE
ナルワールは海で泳ぎ、兄は海を食べます。
BACK INTO ENGLISH
Narwar swims in the sea, and my brother eats the sea.
That didn't even make that much sense in English.