Best Practice Guide to Disposing of Sick, Unwanted or Dead Fish Unwanted fish should be re homed with another private fish keeper. In some cases, the local fish shop can advise on people looking for a particular fish, so it pays to ask around.  If you cannot find anyone local to take your unwanted fish, try asking around on local fish forums or post a notice on TradeMe.  In the worst case scenario, if you can’t find anyone to take your fish, you can consider humane euthanasia. If you need to eut