Once the female is impregnated, she can give birth to as many as five or more broods of young at intervals of four to six weeks. The number of each brood may vary from 12 to 15 babies from a young Mollie to as many as 150 young from a large swordtail.
How can you tell if a black Molly is pregnant?
1 – The first thing that you need to do, is to provide the mollies with extra shelters or hideouts. During the gestation period, the abdomen of the female platy will become enlarged and she will develop a dark spot on her belly, which signals that she’s pregnant.
How long are fish pregnant for?
As examples, the female swordtail and guppy will both give birth to anywhere from 20 to 100 live young after a gestation period of four to six weeks, and mollies will produce a brood of 20 to 60 live young after a gestation of six to 10 weeks.
How long are Dalmatian mollies pregnant for?
The aquarium should be planted as densely as possible or have a thick algae mat. Having a group of floating plants in the corner of the aquarium will promote rearing outside of the breeding tank. Every 60-70 days the female will give birth to 10-60 young that are already approximately one-half inch long.
How do I know my Molly is about to give birth?
The Eyes of the Fry and Signs of Impending Birth
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.
What do you do when a molly fish has babies?
After the pregnant female has released all of her fry, remove the female and return her to the main display aquarium. The fry should be fed a quality food, such as baby brine shrimp, baby fish food, or quality flake food ground into a fine powder. Feed the fry small amounts several times a day.
Does fish give birth through mouth?
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.
Do fish eat their babies?
Sometimes he guards several clutches by different females, cleans the nest, and fans oxygen towards the eggs to improve their supply. Yet scientists have repeatedly observed males eating some of the carefully-provided for eggs. Filial cannibalism often occurs in fish species in which males care for the eggs or young.
How do you know when a fish is about to die?
- Loss of appetite.
- Weakness or listlessness.
- Loss of balance or buoyancy control, floating upside down, or ‘sitting’ on the tank floor (most fish are normally only slightly negatively-buoyant and it takes little effort to maintain position in the water column)
- Erratic/spiral swimming or shimmying.
Can a fish get pregnant by itself?
A female fish has been observed undergoing a rare process in which it grew male reproductive organs and impregnated itself, going on to have offspring. … The team noticed that the fish were able to impregnate themselves, producing healthy offspring who behaved — and reproduced — totally normally.
Is my koi pregnant or sick?
Changes in behavior, such as erratic swimming, koi swimming upside down, abnormal feeding patterns or isolating themselves from others can indicate that your koi fish is sick. Physical symptoms like red gills, cloudy or popped eyes, and swollen abdomen are used to correctly diagnose koi fish diseases.
Do fishes sleep?
While fish do not sleep in the same way that land mammals sleep, most fish do rest. Research shows that fish may reduce their activity and metabolism while remaining alert to danger. Some fish float in place, some wedge themselves into a secure spot in the mud or coral, and some even locate a suitable nest.
How do I stop my molly fish from breeding?
But what can you do to prevent unwanted breeding?
Fortunately, there are ways to minimize the risk of unexpected fry appearing in your tank.
- Buy only one gender of fish, preferably males. …
- Choose egg-laying species rather than live bearers. …
- Adjust tanks conditions to make breeding less comfortable.
How long are betta fish pregnant?
Betta eggs usually hatch within two or three days. The baby bettas, or fry, will wiggle out of their eggs and drop from the nest. The male will collect them and put them back. The fry can’t swim on their own yet and will need time to develop.
How often do guppies have babies?
Guppies typically reproduce about every 30 days and give birth to litters approximately 20 times throughout their lives. The researchers found that as female guppies aged, they began to skip litters or even stop reproducing for extended periods of time, effectively ceasing to reproduce after a certain age.