I have to agree that euthanasia is a better option than palming them off on other unsuspecting or idiotic owners.
Rubbish, these are not the only two options - before it gets too big, phone around a few shops in your area - one will almost certainly have a big tank to keep your fish in; maybe not permanent quarters, but big enough to hold it until they sell it. I had a few of these and the shop told me when I bought them that I could take them back when they got too big for me. I had them for a year or two, and then returned them
You don't kill a fish because its inconvenient - you go to some effort and find it a home. Euthanasia is a last option - and seeing as your fish is not too big yet, you have plenty of time to research this. Place an advert on some internet fish boards - someone will have a giant tank and a shoal of these - its just a matter of finding them
There are people with some pretty big tanks out there, and some shops and public aquaria too. Killing a healthy fish is just not on
/www.practicalfishkeeping.co.uk/pfk/...em.php?news=661