08-03-2010, 11:36 AM
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Release it? Are you joking? A: Who knows what kind of diseases it is carrying from its time with the goldfish. B: Never release captive tank fish into local waters, for the reason of A, and the local environment isnt accustomed to an alien fish. Look at the oscar, tilapia, and plecos who run wild in US rivers. I see the latter two quite often when snorkling here in FL and have been told most of the lakes have oscars as well. Want something more devastating, look at the lionfish out in the Atlantic and see how the fish it shares the reef with like it, something like 70% of local fish are missing due to a predator with no enemies.
If you arent going to keep it, I would personally, your best option is mercifully putting it to sleep in the freezer.