In Japan, their fins are used in shark fin soup, or they are dried and salted. Sharks are sometimes definned and thrown back into the sea to die. When we destroy sharks, we destroy the ecosystem they live in. The populations of the species they prey on become too large and cannot find enough food to survive. In addition, sharks may provide solutions to some medical problems.
Sharks have powerful immune systems and can resist many diseases, including cancer.
Most sharks don t get cancer, and even have substances in their liver and cartilage that can cause regression of some types of cancer. It would be ironic if humans found the cure to one of the most dreaded and feared diseases in a creature they dread and fear. Viviparous-the embryo developss through a placental connection with the mother, much the same as human development. Young are born live after a gestational period of up to 2 years. Ovoviviparous-eggs hatch within the uterus of the mother and the embryo develops via a yolk sac connected to its ventral surface.