Sharks are terrific predators, so much so, they have been found to eat their siblings while still in the womb. Researchers at the Okinawa Churaumi Aquarium in Motobu, Japan, used an underwater ultrasound to see nurse shark pups jumping in and out of their respective uterus in the mother. Share your thoughts in our Facebook Group: http://www.speakupforblue.com/group Take advantage of our Sponsor's, Grove Collaborative, holiday deal for eco-friendly products: http://www.speakupforblue.com/holiday.