Assertion: guppy's fin | /r/Synonym | gonopodium
Facets:
Source sentences:
text: Male mollies use specialized anal fins called gonopodiums to deposit sperm into female mollies.
text: Modified anal fin; males have a modified anal fin which is known as a gonopodium.
text: Male guppies, like other members of the family Poeciliidae, possess a modified tubular anal fin called the gonopodium, located directly behind the ventral fin.