Admiral Ackbar – portrayed by Timothy M. Rose and voiced by Erik Bauersfeld
Commands the Rebel fleet in their attack against the second Death Star in Return of the Jedi. Ackbar was a Mon Calamari leader and military commander. Aptly given a name that means "selfless servant," Ackbar devoted himself to the cause of galactic freedom and became the foremost military commander of the Alliance to Restore the Republic, having previously been an Imperial slave, and the later New Republic.
Had to google this