Vast floating alien city above a calm reflective ocean

A colossal Alien city floating in the middle of a gigantic ocean. There are many different pods of the city, connected by huge white corridors. each pod of the city is comprised of various sized domes made from gleaming white plasteel material. There are also high towers in each pod acting as a space port as there are space ships coming and going. The vast ocean is calm and is reflecting the city in the light of the day. The sky is a light green color with wispy clouds and two large moons int he background