There's an Announcement which spells out the features of Marine Aquarium 3.1. You can read more information here:
https://www.feldoncentral.com/forums...ead.php?t=5635
2. You have been able to use your own mp3 files in Marine Aquarium 3 and this feature is the same in 3.1.
3. Music can be in mp3, and I believe wma format.
4. There are numerous threads in the
Marine Aquarium 3 forum about the new version.