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Gonopodium

Aquarium  Gonopodia  Goslinia Platynema
04/16/2014

Gonopodium: Particular to the Live-bearing tooth carps, the gonopodium is a modified anal fin of male fish that has been converted into a genital organ.


Gonopodium
Particular to the Live-bearing fish, the gonopodium is the pelvic fin of the male fish that have been converted into genital organs.

Gonopodium - Modified Anal Fin in male Livebearers, used to transfer sperm to females.

Gonopodium = Gk word that is used for the external organ of ♂♂ livebearer fishes that is used to transfer sperm into the body of the ♀♀. In fact it is the modified anal fin
Gregarious = organisms living in groups
H ...

The gonopodium is a modified anal fin which is used to fertilize eggs. In the male the anal fin is rod shaped, while the female has a traditional fan shaped anal fin (see photo above).

Note that gonopodium can only move in one direction
The maleness of Anableps is not subtle. What starts out as a normal-looking anal fin forms into a substantial gonopodium. No fragile-looking bony appendage such as you see on a guppy or swordtail.

Males have a gonopodium.
Breeding:
These fish are livebearers, and thus practice internal fertilization. The gestation period of these fish is about 8 weeks, depending on the temperature of the water. 10-15 fry are born, that measure 5-7cm.

Males have a gonopodium and longer ventral fins.
Breeding
Anywhere between 20-100 fry may be produced.

Gravel: Basic bedding for any aquariums, make sure you have enough in your tank.
Gonopodium: An modified anal fin which is elongated. Only appears on the males, which helps to fertilize the females.

SEX:Males possess a modified anal fin known as a gonopodium which is pointed unlike the "fin-shaped" anal fin of the females.
B :Livebearers are well-known for their prolific breeding.

The male`s anal fin, transformed into a gonopodium (reproduction organ). The 3rd, 4th and 5th rays of the anal fin are prolonged into a tube through which the spermatozoids will get into the female genital system.

As the male matures the Anal fin develops into a structure for reproduction called the Gonopodium. The Gonopodium can be moved in almost any direction and stores the sperm in packs called spermatophores.

The male's anal fin is modified into a gonopodium by which he transfers sperm into the female.

The male live bearer introduces his sperm directly into the female's body using his anal fin, which is typically modified into a tubelike projection called a gonopodium.

Fertilization is internal and is accomplished by means of highly modified fin elements within the anal fin of males that form a structure known as the gonopodium.

A: The nice thing about livebearers is that males have a "sex organ" called the gonopodium.

The male impregnates the female by using a modified anal fin called a gonopodium. The fertilised eggs remain inside the female until they hatch and the live young are born as free-swimming miniature versions of their parents.

In addition, like other livebearers the male has a sex organ called a gonopodium, which acts as a sperm-delivering device (similar to a penis in mammals). The female does not have a gonopodium she has a vent.

The male is also slimmer and has a "sword" shaped anal fin called a gonopodium. The female has a fan shaped anal fin, is rounder of body, and will have a spawning patch at breeding time.

Breeding: Males are identified on their stronger colors and their gonopodium. Condition your halfbeaks by feeding them artemia and mosquito larvae. Water conditions should preferable be pH 6.5 and a water temperature 24C /75 F.

If a female remains stationary and her partner contacts her vent with his gonopodium, she is fertilized. The sperm is preserved in the female's oviduct, and so even after males are removed, a female is capable of having six or more broods.

When it comes to guppy breeding the male will chase the female repeatedly from below and behind her and repeatedly extend his gonopodium and mate with the female.

Sexing Information: Males have a gonopodium and females are consideraly larger than males.
Diet: Carnivorous - prefers live insect type foods but will accept flakes or pellets.
Temperment: Peaceful schooling fish ...

The name Xenophallus was given to this fish because of it's unusual gonopodium. It has a series of hook like structures that are easily visible with the naked eye.

As with all woodcats, mature males exhibit a modified anal fin similar to the gonopodium found on many live-bearing toothcarps such as the guppy, platy, molly etc.
Habitat Information
Distribution ...

The males get the "Black Chin Livebearer" name from the large amount of black from the base of their mouth right down to the tip of their elongated gonopodium and along the base of the body to the caudal fin.

They are easy to sex, as the female is larger, and the male has a rod-like anal fin called a gonopodium that he uses to internally fertilize the female. After fertilization, the female can produce multiple batches of babies without a male present.

See also: See also: Fish, Water, Livebearer, Livebearers, Species

Aquarium  Gonopodia  Goslinia Platynema
04/16/2014

 
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