Pregnant Neon Tetra? - The Planted Tank Forum
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post #1 of 6 (permalink) Old 01-14-2013, 07:37 PM Thread Starter
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Pregnant Neon Tetra?

I noticed one of my neons has become very large. At first I thought it might be from overfeeding but it's the only fish to have this symptom (and I only feed every other day or every three days a pinch of Ken's Golden Pearls).

I then thought it may be a swim bladder issue but the neon isn't having any trouble swimming at all. I'm not sure what it is unless it's pregnancy.

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post #2 of 6 (permalink) Old 01-14-2013, 07:52 PM
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Black Neon about to explode ...

Ovt had a similar if not the same issue, only with a black neon

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post #3 of 6 (permalink) Old 01-14-2013, 08:20 PM
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Fish aren't "pregnant" by the terms we use for mammals.
Egglayers are never pregnant. They are "gravid" or heavy with eggs. Only thing that ever comes out of them are eggs which may or may not be fertilized by a male.
Livebearers also are never really "pregnant". The eggs are fertilized in the body but unlike mammals they have no connection to the female. They draw all the nutrients they need from the egg sac while a mammal gets it from the mother. So basically the female "broods" the eggs internally. Just about like mouth brooders just a different location in the body.

Technically these fish don't get pregnant as this is a term reserved for the mother providing nutrients during development. Although it would appear to be a pregnancy since the young are born alive it is not. The eggs are developed by the female and then fertilized by the male (or by stored sperm). The fry then develop from the egg without any nutrition from the female other than an oxygen supply. The term used for a female with developing fry is "gravid".

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post #4 of 6 (permalink) Old 01-14-2013, 08:24 PM Thread Starter
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Thanks ADJ some of that tread was helpful. I do agree that a tumor is a likely cause but because the fish is in no distress I don't see a need for euthanasia.

@Graphics Thanks for the specification
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post #5 of 6 (permalink) Old 01-14-2013, 09:18 PM
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that is a male tetra you can tell by the anal fin, in males the anal fin will have more of a hook shape where as females will go straight back from the tip of the fin


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post #6 of 6 (permalink) Old 01-16-2013, 08:52 AM
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