I've been to various Mac news websites, and I still have not seen any mention of Marine Aquarium.
I would suggest notifying the following websites, they have sections for new software releases.
www.maccentral.com
www.macintouch.com
www.macfixit.com
www.macminute.com
And of course the Mac magazines:
MacWorld, MacAddict, MacHome.
You have such a great and unique program, more people should be made aware of it.
Just my 2 cents :-)