YOU SAID:

fish are fish not fish or fish but they are fish but not fish fish

INTO JAPANESE

魚は魚でも魚でもないが、魚ではないが魚ではない

BACK INTO ENGLISH

A fish is neither a fish nor a fish, but it is not a fish.

INTO JAPANESE

魚は魚でも魚でもないが、魚ではない。

BACK INTO ENGLISH

Fish are neither fish nor fish, but not fish.

INTO JAPANESE

魚は魚でも魚でもないが、魚ではない。

BACK INTO ENGLISH

Fish are neither fish nor fish, but not fish.