As with other large fish and shark species, the basking shark is a carnivorous animal meaning that it only gets it's nutrients by eating other animals. Plankton is the primary source of food for the basking shark along with other small organisms such as fish, squid and crustaceans.
As the second largest shark species in the world, the basking shark has few natural predators. Apart from hunting by humans, the great white shark and the killer whale are the only real threat to the basking shark, mainly due to the fact that basking sharks are slow and generally sluggish swimmers.
Basking sharks reach sexual maturity (can begin breeding) when they are about three years old. Basking sharks are known to mate during the warmer summer months, and their pups (the largest of all shark pups) are born live after up to 3 years of development. Basking shark pups are known to become independent immediately, swimming away from their mother just after birth.
Due to over hunting and rising levels of pollution, the world's basking shark populations have severely declined meaning that today, the basking shark is considered to be an animal that is under threat from extinction.