Releasing Pet Fish?



Hey guys, I need to get serious for a moment.  I got a message today on my Facebook page from someone letting me know that they released a captive Oscar into a nearby river.  Please, do not ever release captive fish into the wild no matter what type of fish it is or where you live.  This is a bad idea for many reasons. 

Firstly, your captive fish may be carrying certain diseases that it has immunity to, but the native fish population does not.  Entire native fish populations can be wiped out if you introduce a novel disease into their environment.  The fish you release may seem perfectly healthy, but that doesn’t mean it isn’t carrying something that it is immune to.  This really does happen.  For example, there is a pathogen called Chytridiomycosis (Chytrid for short) that is decimating wild amphibian species across the world, and there is significant evidence suggesting that it was originally spread into the United States by captive African Clawed Frogs that were used for research. 



As if that wasn’t enough of a reason not to release captive fish, there’s more!  Certain captive fish, when released into a favorable natural environment, can become extremely invasive and out-compete other fish for resources.  This can also result in native populations of fish being wiped out, which has a ripple effect on the entire ecosystem of the area. 

This issue is a danger to our hobby of fish-keeping, and especially goldfish-keeping.  Did you know that some states and countries have been creating more restrictive laws about moving fish between states and between countries because they’re concerned about these fish either spreading disease to native fish or becoming invasive in native waters?  If you release captive fish into the wild, you are endangering not only the native ecosystem, but also the hobby we love so dearly!  So please, think twice before releasing that fish.  If you don’t want it anymore, bring it to your local fish store for rehoming.  Every pet store I’ve ever been to has accepted fish from people and sometimes will even give you store credit in return for the fish.



Thanks!

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One thought on “Releasing Pet Fish?

  1. Stef

    In San Francisco they are creating a special pond where people can dump their unwanted goldfish. Officials are hoping this will prevent people from throwing away their fish into other lakes and destroying the flora and fauna. I think it’s a really smart move since people are still going to do things even though they’re not allowed, so giving them an alternative for releasing their unwanted fish will probably curve this behaviour. Here’s the news article: http://sanfrancisco.cbslocal.com/2014/11/22/amnesty-pond-for-dumping-unwanted-goldfish-planned-after-deadly-restoration-of-sfs-mountain-lake

    Reply
  2. Ocean Truth

    Releasing any kind of animal into the wild is really irresponsible. Unfortunately, there will always be knuckleheads who think it’s harmless and will continue to do it. I can definitely see a day where more and more restrictions on what you’re allowed to keep as a pet get imposed…

    Reply

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