Spanish Coastguard teams helped evacuate the people onboard the FRS San Gwann ferryboat while a rescue helicopter medevaced the kid to a hospital.
The ship, carrying 35 passengers and 12 crew, was traveling between Ibiza and the neighboring Formentera island (Balearic Spain) when it ran aground on the Es Malvins islet.
The nationalities of the injured including the kid are not yet revealed. The boy is said to be seriously hurt, while the other travelers are believed to have suffered minor injuries.
FRS Ferry said that the San Gwann Ferry operated by FRS which covers the Ibiza-Formentera route had "suffered an accident on Saturday after running aground on the islet of Es Malvins following its departure from Ibiza at 9:30 pm."
'FRS has activated its security and emergency protocols and immediately informed the authorities of the incident. At the time of the accident 35 passengers and 12 crew were on board.
'After the impact the crew helped the passengers until they were all evacuated.
'FRS would like to thank Spanish Coastguards who were involved in the rescue operation and the evacuation of the vessel, as well as the other institutions who have participated in the evacuation.'
Thousands of vacationers travel to Formentera during the summer months by ferry from Ibiza. The island is popular for its crystal-clear water and long white sandy beaches. Recent visitors included Duran Duran frontman Simon Le Bon (videoed treating fans to an impromptu performance).