Free Dolphins have hundreds of miles to swim in the ocean, while they can not do it in captivity.
According to some marine biologists that have studied dolphins, the life span of a dolphin is up to 20 years old.
Dolphins tend to live up to 20 years according to some research. However in some occasions, dolphins have lived up to 48 years
Dolphins live up to 40 years although the average is 25 years.