Frequent question: How long do tropical fish stay 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.

How often can tropical 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.

How do fish get pregnant tropical?

Reproduction is different depending on the species but generally happens one of three ways. In most cases, the female drops eggs in the water which are immediately fertilized by sperm from the male. Another way is for fertilization to occur within the females body before she drops them into the water.

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.

How can you tell if a fish is a boy or a girl?

Males are often slimmer but larger-bodied than females and are more vibrantly colored. The dorsal and anal fins of the male are more pointed, larger and more flowing than in the female. In many species, the male will display egg-shaped markings on the anal fin known as egg spots.

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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.

Why do male guppies chasing pregnant female guppies?

During mating season, male guppies either attract females with their brightly-colored bodies or harass smaller females into mating by nipping and chasing them. … In an attempt to avoid the harassing male, the female gives up precious time and energy for foraging, growth and reproduction.

How do you tell if your fish is pregnant or just fat?

Carrying Eggs – One reason your fish may appear slightly bigger is because it is carrying eggs. If your fish is a female, is not overly fat, and is normal in most other regards, this is a very high possibility. Another indication is if your fish has an enlarged vent; this is where the eggs will come out.

How do mermaids have babies?

The female will lay the eggs and they will be dispersed through the water where the male will fertilize them. But some fish engage in a form of intercourse or a mating ritual. There are also types of fish that can fertilize themselves. The best hypothesis for mermaid reproduction is that they mate in the same fashion.