How do molly fish give birth?

Mollies are livebearer fish which means they do not lay eggs but rather gestate their young and give birth to them live. You will not need to do much to get mollies to breed as long as you have males and females in the same tank.

How long does it take for molly fish to give birth?

The gestation period of a molly fish is around 60 days. Female mollies can store sperm for months and may fertilize eggs as often as every 30 days, even when no male is present in the tank. Mollies may release 10 to 60 live fish at a time.

How long is the pregnancy of a molly fish?

As I’ve mentioned above, mollies are usually pregnant for a period anywhere from 20 to 40 days (average 30 days). Of course, that would be how long they’ll last from conception to birth. But before this period, there is usually a courtship period between the male and female molly, which can last another couple of days.

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How do I know when my Molly will give birth?

The Eyes of the Fry and Signs of Impending Birth

To accommodate the developing eggs, the mother’s body expands, becoming deeper and broader. A few days before delivery, she develops a bulge below the gills, her outline becoming fairly square in this region, while the gravid spot has enlarged its area.

Do Molly fish protect their babies?

Mollies belong to a class of fish called livebearers. They don’t lay eggs; their young come out swimming. … Molly babies get no protection from their parents. The tiny fish are just as likely to be eaten by their own mother as they are by other fish in the aquarium, so to survive they’re going to need a little help.

How do mollies mate?

The Basic Mating Behavior of Black Mollies

When black mollies mate, the male will transfer milt, the fluid that contains his sperm, into the female’s body using is gonopodium. The gonopodium is a special anal fin that is shaped like a rod rather than a normal fin.

Can Mollies change gender?

Mollies are not able to change gender. The gender of these fish is determined by their genetics so it is impossible for them to change sex.

Will baby fish survive in my tank?

Not necessarily. Many fish breed very easily and produce great numbers of offspring, simply because very few will survive to adulthood. The more fish in your tank, the more you will need to feed them, the more feces they will produce and the harder your filtration system will have to work.

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How do I know if my fish is pregnant?

As your female fish becomes pregnant, she will grow a bulge at the back of her abdomen. This typically appears over the course of 20-40 days. Does your fish have a red or black spot? Sometimes, when a female fish is pregnant, she will develop a “gravid spot” on the abdomen.

How fast do baby fish grow?

How Long Does It Take a Fish to Grow to Full Size? The length of time it takes a fish to reach its full size depends on many different variables, but usually, in about 1-2 year, your fish should be the adult size.

How do you tell the difference between a male and female Molly?

Males and females can be differentiated by the shape of their anal fin. Males have a anal fin that points backwards. Females’ anal fin looks just like the rest of their other fins. More than one molly can be kept in a tank together, however, they have been known to nip the fins of others in their tank.

Why is my molly fish wiggling?

It occurs when fish are under severe stress, most often because of environmental problems. The classic scenario is when mollies are kept in soft or acidic water conditions. Though tolerant fish in many ways, they do not do well in soft or acidic water, and it is very common to see mollies kept that way start to shimmy.

Do fish give birth out their mouth?

This process is called mouthbrooding. … Sometimes the female fish will carry the fertilized eggs in her mouth, or the male and female will trade off, which is called biparental mouthbrooding. Typically fish that are born via mouthbrooding are underweight at first and require recovery time to feed and grow.

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