Reproductive system in fish

• The components of reproductive system are the sex glands or gonads and their ducts.
• Fish reproductive organs include testes and ovaries.
• There may also be a range of secondary organs that increase reproductive fitness.
• The genital papilla is a small, fleshy tube behind the anus in some fishes, from which the sperm or eggs are released; the sex of a fish often can be determined by the shape of its papilla.