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Old June 15th, 2005, 12:47 PM
Lucky Rescue Lucky Rescue is offline
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Join Date: Jul 2003
Posts: 10,287
Your fish are "late bloomers" as some male swordtails do not develop their "swords" until they mature, depending on a lot of factors.

Some old females may also grow a small sword too.

How big is your tank and how many fish are in it? Male swordtails can be aggressive so you must never overcrowd your tank as they need room for territories.
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