This was posted in a thread that is closed with the note that there is no need for a separate thread.
So, where should it be?
Installer version of Beta10d, downloaded from SereneScreen on June 5, 2009, contains:
MarineAquarium3.scr - file size 6,578,176
Installer version of Beta10d, downloaded from SereneScreen on January 18, 2010, contains:
MarineAquarium3.scr - file size 6,565,888