Sharks generally have a long life span. Under normal circumstances, the life span of sharks can reach 70 years, and some can reach 100 years old. At present, the longest life span of sharks can reach 500 years old. Sharks have such a long life span, largely because of their very strong immune system, which makes them much less likely to get sick than other animals and humans. Some researchers have done studies in which only one shark out of more than 20,000 develops tumors, indicating that they are highly resistant to tumors and related infections. In addition, after they are injured, their wound healing speed is also very fast, about two times faster than human healing ability.
Of course, their specific life span is not certain, and will be affected by their surrounding environmental factors. For example, when the water quality of the ocean is polluted, it will have a certain adverse impact on the life of sharks and shorten their life span. In addition, they also have the possibility of being killed by natural enemies, which may also affect their life span.
There are many kinds of sharks, and the age of different kinds of sharks when they enter adulthood is not very consistent. But generally speaking, their adult age is concentrated between 12 and 15 years old. The specific time is not necessarily, the adult age of large sharks may be relatively late, and the adult age of small sharks may be relatively early. Even for the same kind of shark, there will be some differences in the age when they enter adulthood, because the environment around them is different.
