Shark embryos from tiger sharks will eat one another in the womb. That's because female sharks can be impregnated by multiple fathers simultaneously, creating multiple embryos from different ...

Measuring in at 56 centimeters (22 inches) in length, the organism is actually a fetus, extracted from the womb of a pregnant dusky shark, caught by fisherman Enrique Lucero León near Cerralvo Island ...

Sharks belong to the classification Chondrichthyes ... and even how they reproduce – some are actually cannibals in the womb and eat their siblings. But many of these species are at risk ...

Sand tiger sharks eat their siblings in the womb; a phenomenon known as embryonic cannibalism or embryophagy. When the first embryo in each uterus reaches a certain size it consumes all its siblings.