The use of the fish is a recurring internal joke at Microsoft, specifically a pun on the software's development stage.
Lead designer Jensen Harris later revealed that the default lock screen images were internal markers for design principles. While the Seattle Space Needle became the final RTM (Release to Manufacturing) image to showcase "Pride in Craftsmanship," the fish remained a cult favorite for enthusiasts who preferred the "Beta" look. img24 (Windows 7 Beta) - Windows Wallpaper Wiki - Miraheze 1920x1080 Windows 8 fish wallpaper. Fish wallpa...
: For the Windows 8 Consumer Preview, the fish was "Metro-ized"—reimagined using the new "Modern UI" design language. This version featured a more stylized, digital-looking fish with bubbles arranged to vaguely resemble the number 8 . The use of the fish is a recurring
: Early 2010s design favored "Frutiger Aero," characterized by glossy textures, water droplets, and natural imagery to make technology feel eco-friendly and utopian. img24 (Windows 7 Beta) - Windows Wallpaper Wiki
: Windows 8 moved toward a philosophy Microsoft called "Authentically Digital". This meant abandoning fake textures (skeuomorphism) for flat, fast, and fluid interfaces. The stylized fish was a compromise—keeping the natural motif of the previous "Beta" but rendering it in the new, minimalist style. Design Easter Eggs