Great whites are also thought to exhibit intrauterine cannibalism. Viviparous sharks form a placental from the embryo to the oviduct wall. An embryo inside of an oviduct. The yolk in the yolk sac is first consumed by embryo, then uterine milk produced by female is absorbed by an embryo through the means of a placenta that is formed from the yolk sac to wall of uterus. Sharks are born live, and ready to fend for themselves outside the female.
Oviparous sharks lay egg cases.
The embryo feeds on the yolk sac inside. Examples of oviparous sharks include the Swell shark C. ventriosum , horn shark, H. francisci . An egg case with yolk sac inside for nourishment laid by the female on the ocean bottom or on rocks. Yet, the shark's ability as a predator is based on much more than just olfaction. Vision Sharks have slightly farsighted, panoramic vision.