Only one pregnant female is known to have been caught; she was carrying six unborn young.
Do fish have all babies at once?
It can often be difficult to identify when a fish is pregnant, and depending on her breed your fish can give birth to anywhere from a dozen to a couple hundred fray at once. Some aquarium fish carry the eggs inside of them.
Can fish have babies without a mate?
The small fish species, who is native to the border region of Texas and Mexico, does not produce any male offspring. … The females reproduce asexually through gynogenesis, making their daughters identical clones of themselves.
How often do fish have babies?
Depending on water conditions, temperature, and diet some livebearers can have broods as often as every four to eight weeks. You can tell if a female is ready to give birth by her enlarged abdomen or a dark spot located near her anal fin. The spot will turn darker as her delivery date nears.
How does a fish give birth?
Most fish release thousands of eggs, scattering them in the water where the male fish fertilize them. The eggs develop and hatch into larvae (baby fish) without any help from the parents. … A few kinds of fish keep their eggs inside their bodies, so when they hatch they give birth to live young.
How can I tell 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.
Can fish have unfertilized eggs?
Most fish, including trout and salmon, lay unfertilized eggs. The eggs are fertilized externally by the male. … The eggs hatch in two weeks to six months, depending on the species and the water temperature. During the migrations and nest-building activity proceeding mating, neither the females nor the males consume food.
Can some fish asexually reproduce?
Asexual vertebrates are extremely rare. There are only about 50 naturally occurring fish, amphibian, and reptile species that reproduce asexually. The Amazon molly, Poecilia formosa, was the first all-female vertebrate species described back in 1932.
How long is a fish pregnant?
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.
Can my goldfish have babies?
How many babies do goldfish have? A goldfish can lay anywhere from a few hundred up to 1,000 eggs at a time. However, some of these eggs do not get fertilized, some do not develop, and others may not hatch.
Why do fish eat their babies?
After giving birth to their offspring, guppy fish will not exhibit any parental care and if left in the same aquarium with the fry, they will mistake them for food and eat them. … A further explanation is that by eating her own fry, the female guppy is replenishing her fat storage.
How long do baby fish take to grow?
About 3 months, just as long as you provide them with the necessary nutrition and conditions. How long should I keep the fry in a separate tank? Until they are bigger than the other fishes’ mouths.
Which fish have live births?
Livebearers are aquarium fish that retain the eggs inside the body and give birth to live, free-swimming young. Among aquarium fish, livebearers are nearly all members of the family Poeciliidae and include guppies, mollies, platies and swordtails.
How many eggs a fish can lay?
Fish reproduce by bearing live young or by laying eggs. Livebearers give birth to fully formed and functional young called fry. The eggs are fertilized and hatch within the female. … Most species of livebearers kept in home aquariums are generally easy to breed.