Mysterious baby fish

L

liebre

AC Members
Nov 12, 2006
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I'm new here and I also posted this question at the fish.com forum. Hope this isn't considered bad form to post here also.

I came home today to find or two very tiny fish swimming in my tank. The only fish I have is a platy (doing much better after treatment for the anchor worms) a rasbora, and a glowlight tetra. The Platy and Rasbora have been in my tank for about 10 weeks and the glowlight tetra for about 5 weeks. The glowlight looks very ill. His red stripe is gone and he is turning white all over, laying upside down and gulping for air. But I digress. Who had the babies? Is there anyway a rasbora and tetra can spawn?

Thanks for the help.
 
I'd say it was the platy - in my experience, female platies can store sperm for upwards of 6 months and continue to produce fry with no males present.
 
I would like to add that they are always pregnant if they are mature when they come from the store. I once bought 2 females that I thought were mature but in a few weeks I had a male and a female.
 
It is my experience that platies are not always pregnant. If they get stressed or if the male/female ratio isnt right they hold back on pregnancy. I have had a couple of females in with several males in a very large community tank and they have only been pregnant and produced fry once in 5 months.

Having said that it is almost certain that your fry came from the platy.
 
I have swordtails which are related and Ive watched mine for countless hours. when i have had a higher ratio of males than females, i find the males always fight each other and try and mate the females all the time. they constantly follow them and when they are laden with fry actually nip at their vents chasing them as the release fry from stress. an easy breakfast i guess. but when the females ratio is higher they dont seem to single out the females when pregnant. better things to do i guess lol. and yes i have had babies from store bought females without males for months too
 
Yes they are definitely from the Platy. I can see little black tips on their tails. There appear to be three or four now and so far they have survived for at least five days (in spite of the fact I'm running a three-week course of Parasite Clear to get rid of the anchor worms that were infesting their mother). I'm not doing anything for them but would like for at least a couple to survive if possible. They just hang out down under the gravel in the bottom and back of the aquarium and come out ocassionally. One did get "stuck" to the filter intake yesterday and I unplugged it momentarily to let it free.

Do they get enough food from stray stuff left in the water? I dropped a brine shrimp pellet down in the back thinking maybe they could eat from that. Is there much chance of one or two surviving to maturity?
 
Well, I only had one dying fish and it died. I really don't know what happened to it unless it was that my ph was too high. Its close to 8 and this fish was a fireglow tetra. All other water parameters seem good to me according to the test strips I use.
 
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