During the Galactic Civil War, the Mon Calamari eventually joined the Rebel Alliance after the Empire used a Star Destroyer to destroy three floating cities on their watery world. They proved an invaluable asset, primarily due to the Mon Calamari being masters of starship construction and supplying the Alliance with badly needed capital ships, Mon Calamari Cruisers, that could take on the Galactic Empire's ships of the line. Prior to joining the Alliance, the Mon Calamari had only built passenger liners because of their peaceful ethos. Also renowned for their performance art, lithe Mon Calamari water dancers often perform in some of the galaxy's most prestigious venues, including Coruscant Galaxies Opera House, where the ballet "Squid Lake" ran for some time during the waning days of the Republic and was known to be a personal favorite of Supreme Chancellor Palpatine. The most famous Mon Calamari is Admiral Ackbar, the supreme admiral of the Rebel Alliance's naval forces. Another Rebellion-sympathetic male Mon Calamari named Quarrie, the spacecraft engineer character named for Star Wars visual artist Ralph McQuarrie, was the designer of the B-wing starfighter prototype named the Blade Wing, as seen in the Star Wars Rebels second-season episode Wings of the Master.