Tropical Fish Keeping - Aquarium fish care and resources

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srb325i 10-31-2008 11:10 AM

swordtail fry
i was just wondering how fast do swordtail fry grow?

srb325i 10-31-2008 11:30 AM

actually if thier's anything at all anyone can tell me about swordtail fry this is my first attempt at breeding

Storm 11-02-2008 07:17 PM

Swordtail fry
I have bred my swordtails numerous times and so hopefully i will have some information helpful to you. First if you want these fry to survive you will need a special breeding tank that you can buy at practically any fish store. this "tank" as i call it will go inside your actual tank. when the female looks like she is ready to burst and have babies (She will have a dark gravid spot) then you will put her in this tank. The only reason i'm calling this a tank is because i forgot the word for it. This is not a breeding net were the adult fish has access to the fry. The tank will have small slit opening were the fry will fall through and be protected from the adult. Adult swordtails will for SURE eat fry. After all the babies are born remove the mother. The babies are born usually in the early morning. Then crush flake food into powder and feed this to the fry later on that day. When they get to being a bit over an inch you can try an introduce them to the parents but make sure that you see no aggression. If you see aggression remove them until their a bit older. I usually see around 30 plus swordtail fry but i've heard they can have up to a hundred at one time.

iamntbatman 11-05-2008 11:23 PM

Following Storm's advice using a breeding trap (or doing something similar) will result in a high survival rate for your fry. However, you need to consider that if you have both male and female swordtails in your tank, the females absolutely will drop fry on a regular basis. They can quickly overrun your tank on their own, so you'd be up to your eyeballs in swordtails if you saved every single fry. So long as you've got some hiding spots in your tank, you can just let things go naturally and some fry will survive to adulthood. It may sound cruel, but unless you have plans for housing all of the fry you will be getting until they're big enough to sell, it may be a better option.

srb325i 11-08-2008 12:00 AM

thanks i currently have the fry in a 1 gallon betta tank until they get big enough to join the rest of my fish how long will i have to wait til thier big enough to go in my main tank

iamntbatman 11-12-2008 10:40 PM

I can't tell you, since all of my swordtail fry never lived more than a few hours (killifish really like to eat swordtail fry, lemme tell you).

However, my guppies get big enough to be ignored as food items by adult guppies within maybe three weeks. I've had Endler's livebearers grow much faster than that - I've got one that has gone from newborn fry to fully colored adult male in less than a month.

Oldman47 11-16-2008 10:40 AM

In a 1 gallon container, if you have more than 2 or 3 fry, they will never get big enough to return to the main tank. You need to provide lots of space, good food and frequent water changes to get swordtail fry to grow. Given enough room to grow, the fry will be big enough in a month to survive with the adult swords. I would use no less than a 10 gallon to grow out a single swordtail drop to the point they could go back into the big fish's tank.
If you have heavy plantings in a peaceful, well fed community tank, you will get a few fry from each drop that survive. In a community tank like mine than has a betta, a large angel, several gold barbs, a few rasboras some rainbow cichlids, lots of mollies and platies, there are never any survivors. On the other hand, my endler tank, that only has endlers and cories in it, will rapidly fill to the point that there is no room for more fish to be comfortable. The same is true of my other single species livebearer tanks where the population grows until it starts to get a bit crowded. At that point there are usually enough hungry mouths that the expansion stops on its own.

Skeeter 11-18-2008 06:37 PM

Dude I just saw my first fry ever swimming around!! It's a tame tank, swords and a few tetras, except for one gourami who I caught chasing the fry (that's how I spotted it) If I catch that gourami eating a fry... Well, I have a hungry looking Oscar. :)

jr.masterbreeder 11-28-2008 10:42 AM

swords take a while to grow. I've had them grow into healthy adults. if you dont have enough room for lots of fry, let nature take its course. thats what i do... I'm sorry if that sounds brutal but i like watching how things happen in nature without human intervention, (on a smaller scale.) But i've ended up with around 5-10 swordtails that grew up entirely... one i had for almost
1 1/2 years after it was born. and also... seperate the males and females as soon as possible to prevent pregnancies. you will have to look for a gonopodium before the sword to determine the sex, as the sword takes longer to develop than the reproductive parts. most swordtails will be able to mate within 2-3 months after birth. And as said before. wait till about an inch or an inch and a half till reintroducing to the parents. I've actually had parent fish kill 1 inch long fish. but they were outwardly aggressive to ALL fish. but that shouldnt be a problem. Also as with all fish, the female has a chance of dying, which has only happend to me once.

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