The male guppy extends a tube from his gonopodium and inserts it into the female's genital pore during guppy reproduction. Once the male inserts the tube, he ejaculates sperm into the female. The sperm mixes with one of the female's egg cells to form a new cell that eventually becomes a baby guppy.
Female guppies can hold on to male sperm for up to three spawning cycles. This means that if the guppies mate and the male is removed, the female is still able to give birth up to three times without mating again. Each time the female gives birth, she is able to produce approximately 20 to 200 babies. The exact number usually depends on her size.
As the babies grow, they are attached to a yolk that nourishes them. The average gestation time for a guppy is 28 days, but females can have gestation periods that range from 20 to 40 days. It is not possible to tell if a female guppy is pregnant merely by looking for a growth in her belly area, but it is possible to tell by looking for a gravid spot. A gravid spot is a dark patch on the female guppy's belly.Learn More
Fancy-tailed guppies, also known as fan-tailed guppies, are a popular species of freshwater fish named for their colorful, fan-shaped tails. Male fancy-tailed guppies have the biggest, most colorful tails.Full Answer >
Guppies do not lay eggs. They are live-bearers, meaning that the female retains the fertilized eggs within her body until the fry (baby fish) are mature enough to be hatched and live independently.Full Answer >
While guppies do not bother other fish, selecting appropriate species to share their tank involves choosing types that don't bother them, such as small cichlids. Although larger cichlids are sometimes aggressive, rams and kribs are available in several colors and generally do not bother other fish in the tank.Full Answer >
The mating ritual of oscars begins with a pair of fish engaging in such activities as nipping, jaw locking, chasing each other around, picking up sand in their mouths and relocating it elsewhere in the tank. Once the oscars decide to mate with each other, they begin to prepare an area for their eggs.Full Answer >