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. With the third and final method, the female retains the eggs within her body and the young are born alive.
Can fish make babies on their own?
A species of freshwater fish can impregnate itself — by growing male sex organs and then mixing sperm and eggs in its own mouth, scientists said.
How do fish reproduce?
Nearly all fish reproduce by sexual reproduction – the fusion of sperm produced from testes and eggs produced from ovaries. … Fertilization is external in most fish species. Large quantities of eggs and sperm are simultaneously released into the water by females and males. This process of egg release is termed spawning..
How do fish lay eggs?
The methods of reproduction in fishes are varied, but most fishes lay a large number of small eggs, fertilized and scattered outside of the body. The eggs of pelagic fishes usually remain suspended in the open water. Many shore and freshwater fishes lay eggs on the bottom or among plants.
How long do fish take to get 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.
Why do fish eat their babies?
Some fish species such as angelfish are known to take care of their fry and help them grow. But even these fish that exhibit parental care will at times eat their own fry. … A further explanation is that by eating her own fry, the female guppy is replenishing her fat storage.
How do fish have SEXS?
For some species of fish, reproduction is beyond casual. Females release eggs into the water, males release sperm, and the eggs get fertilized. The male uses a bony organ on his chin called a priapium to hang on to the female’s urogenital opening, which is also on her head. …
How do fish mate in a fish tank?
1. Live-bearing: In this type of mating, the male fish transmits sperm into the female with the aid of the anal fin – sometimes called ‘gonopodium’ since it is adapted for insemination. The released sperm then (internally) fertilize the eggs stored in the oviduct of the female.
How do fish reproduce asexually?
The fish reproduces using a strategy in which a female’s egg cell develops into a baby without being fertilized by a male’s sperm cell. But that does not mean the fish does not need some hanky panky. … About 50 vertebrates are known to use asexual reproduction including fish, amphibians and reptiles.
Do female fish lay eggs without male?
As Charles stated, females can lay eggs without a male, however it requires the male to fertilize the eggs.
How does a male fish fertilize eggs?
The fertilization can be done in a number of different ways; either by the male rubbing his sexual organs on the eggs, releasing sperm, or releasing sperm into the water to join the eggs in the zooplankton layer (if the eggs have been laid in that way).
Does fish give birth through 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.
How do you tell if a 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 many babies do fish have?
How many babies can fish have? It really depends on the species, but for a usual goldfish, it can be up to 45-50 babies.