11. This process of internal fertilization would stimulate biological productivity, further accelerating the in-filling process. 12. Like other Goodeidae, butterfly splitfins mate by internal fertilization and spawn fully developed young. 13. Internal fertilization takes place after insemination of a female by a male through copulation.14. They reproduced through internal fertilization rather than mating in water. 15. It is gonochoristic and sexually dimorphic, depending on internal fertilization for spawning . volutes. 16. A male often deserts first because internal fertilization allows the male to impregnate and leave. 17. A few species have internal fertilization , with mating occurring before the female fully sheds her cuticle. 18. Sperm is drawn into a female's gills with the inhalant water and internal fertilization takes place. 19. However, a few oviparous fish practice internal fertilization , with the male using some sort of skates. 20. Reproductively, they are dioecious, with the internal fertilization of eggs that are then laid in gelatinous strings.
