An modified anal fin which is elongated. Only appears on the males, which helps to fertilize the females. You would expect to see these organs in Livebearers. Go Livebearers
Rays of the anal fin modified into a copulatory organ in male live-bearers, e.g., mosquitofish
a term given to the anal fin (or the anterior portion of it) of a male fish when it is modified to function as a copulatory organ, e.g., in guppies
a specialized part of the anal fin in male Poecilidae that is used to transfer sperm to female fish
Modified Anal Fin in male Livebearers, used to transfer sperm to females.
a modified anal fin in males of certain species of live-bearing fish (i
a modified, tubular anal fin used to fertilize the females
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.
modified anal fin found on male livebearers (guppies, platies, mosquito fish, mollies, swordtails, etc.) that is used to deliver sperm into the female livebearer's vent.
Modified anal fin of male livebearing fishes.
Particular to the Live-bearing tooth carps, the gonopodium is the pelvic fins of male fish that have been converted into genital organs.