These mighty predators can be found in the coastal waters of all major oceans, open ocean, as well as on long oceanic migrations and trips into very deep water. Mature individuals can reach over 20 feet in length and weigh over 7000 pounds! Their lifespan is estimated to be around 70 years. One of the densest great white populations is around Dyer Island, South Africa, where most great white shark research is conducted. The great white is one of only a few species of shark that will raise its head above water level to look at objects such as prey.