Imagineer Jerre Kirk oversaw the creation of the attraction, which featured cutting edge technology. The first three scenes in the attraction were set in a coral reef. To create this environment, Imagineers used "very thin castings of fiberglass", which had never been done before <ref name= "explore"> https://www.explorethemagic.com/forums/47-current-attractions-and-updates/5638-the-seas-with-nemo-friends.html </ref>. The final scene in the attraction featured the animated characters swimming with real marine life in the pavilion's giant aquarium. To create this effect, Imagineers needed a new kind of projection technology. Disney had never projected animation into an aquarium before, however Research and Development Designer Alfredo Ayala came up with the new projection technology that allowed Disney to insert the characters into the tank using special effect glass <ref name= "explore"/>. According to WDI Vice President Kathy Mangum:
{{Quotation| “He [Alfredo] played with it, developed it, and set up a demonstration. That demonstration really opened up the opportunity for us to create the finale. The technology really drove what the creative application could be.” <ref name= "magic"/>}}
After much trial and error with the new projectors, Imagineers were able to create the environment that they wanted <ref name= "explore"/>. In order to make sure the animation in the attraction was in line with the film, representatives from Pixar were on hand to help with the new attraction <ref name= "magic"> http://forums.wdwmagic.com/threads/nemo-ride-description-spoilers.97827/ </ref>. The final scene also featured Nemo and the rest of the characters singing "In the Big Blue World" which was taken from the [[Finding Nemo - The Musical]] attraction <ref> http://themeparks.about.com/od/disneyridereviews/fr/NemoRideEpcot.htm </ref>. Finally, on January 24, 2007 the Seas with Nemo and Friends was officially rededicated and opened to the public.