In some species, the female will produce unfertilised eggs, which are eaten by embryos. This is known as oophagy ('egg eating') and occurs in species including the shortfin mako (Isurus oxyrinchus) ...
Food Control 47:436-443. Lopez, S.A., N.L. Abarca and R. Meléndez. 2013. Heavy Metal Concentrations of Two Highly Migratory Sharks (Prionace glauca and Isurus oxyrinchus) in the Southeastern Pacific ...