Genital Pore

a paired or unpaired opening in cyclostomes and some bony fishes that connects the body cavity to the environment and that serves to eliminate eggs and sperm. Genital pores are found in cyclostomes of both sexes; they open into the urogenital sinus (lampreys, Bdellostoma) or into the cloaca (hagfishes). Genital pores are not paired in many eels or in several teleosts, including salmon. In these fishes only females have a single genital pore, which is usually situated behind the anal opening.