This installment is designed inside an ocean and you can also get many beautiful fish's inside this screen shot and this installment is related to these fish's. I have also played that version and it will not take too much space because this is a small computer game so, it will not take high space.
Finding Nemo PC Game System Requirements
Ram = 256 MB
Graphics Card = 16 MB
Windows XP, Vista, Windows 7+Windows 8 (32 and 64 bits)
Hard Disk Space = 600 MB
Direct X 11