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Old 10-24-2011, 06:02 AM
356 posts, read 829,930 times
Reputation: 380


I recently upgraded my one gallon tank with a guppy in it to a 2.5 gal with the guppy, and a couple of glofish. When I purchased the glowfish and brought her home, I realized her belly was huge! I went out to dinner and when I came home it had gotten tremendously smaller! She was back to normal size. I did some research thinking maybe it was pregnancy and sure enough there are now little black specs on my fake plant. I'm not sure how to see if the other glowfish I have is male or female to see if he will fertilize them. I have enough room for 2 or 3 more in the tank so it'd be cute to watch them grow.

Can someone show me where I can view some pictures of the difference between a male and female glowfish?
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Old 10-24-2011, 10:26 AM
5,064 posts, read 15,897,830 times
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I hate to tell you this, but you really need a bigger tank for your fish. If you want to keep danios in your little tank, you should take the guppy back to the pet store, and get another glofish. Glofish are actually zebra danios that have been genetically modified to "glow". A lot of people are against this for obvious reasons, but I won't go there. But danios are schooling fish, and really need to be with a minimum of six of their own kind. But that would be a tight squeeze for a 2.5 gallon aquarium, and even more of a death sentence for your guppy. You might get away with just three glofish, but that's still awfully small for them and you'd need to keep the tank very clean. Danios can nip and harrass one another if there aren't enough of them to school with, too. And you'd never be able to keep any fry alive in it. To tell the difference between male and female danios, the females have bigger bellies.

Here are some links regarding danio care:

GloFish, Danio rerio, with care, maintenance requirements and breeding nformation for your tropical fish

Zebra Danio (Danio rerio) - A Profile of the Zebra Danio (Danio rerio)

Zebra Danio - Danio rerio Fish Care
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