why did atlantis sink

Did Atlantis sink in 1814 instead? Or maybe I missed the point and Atlantiens just age slower than humans? Why are the Atlantian's flying machines shaped like fish? They were built before the city was sunk. Fish have quite an aerodynamic build, so it would be practical to have them fish shaped. The existence of Atlantis has been debated for a long time. Theories put forward about it's location are abundant but each theory has one thing in How did it look? Is there any proof of its existence? How has Atlantis been incorporated into popular culture? A city considered