A Bermuda-born dolphin has died in an accident at a Chicago zoo.Nea, who was born at Dolphin Quest in 2007, was taken to the Brookfield Zoo at age three.She is believed to have suffered a fractured skull in a collision with another dolphin on Monday.According to a Fox news report, zoo officials described it as a “freak accident”.“No one saw what happened, but her trainers heard a loud pop and jumped into the water,” said Fox.“They found Nea unresponsive and attempted CPR. Veterinary staff arrived within ten minutes to assist, but they were not able revive the dolphin.”