Reproductive Biology

Sexes are separate and fertilization occurs in the genital sac, where male often lives. Larva is free swimming. Bonellin has an important role in the determination of sex; it is considered

to be a masculinizing factor. If the larva settles on ocean floor, it develops into a 3.9-in (10-cm) long female. If the larva settles on a female's body (particularly its proboscis), it develops into a 0.039-0.078-in (1-2-mm) long adult male in 1-2 weeks. Male lives as a parasite and produces a ready supply of sperm.


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