Er! Since when was Ranchu's ever part of Malaysian River ecosystem? As a breeder you should very well know the real responsibilities of protection of our local flora and fauna. No doubt.. it is rather impossible for GF's to propagate and thrive in our system.. but then again the act of releasing non indigenous species itself is already considered irresponsible. In trying to rid "culls" that are not up to mark, you should perhaps sell them of as feeders or get some predatory fish to feed on them.

Destroying the fries are more responsible than releasing them into our local flora and fauna.

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Be responsible for your actions.... what goes around comes around....