Kimmemann,
There really isn't anything released from the Freshwater Aquarium yet. Jim has (repeatedly) stated that there is no set release date for the Aquarium. That will happen when he feels that he's "done" with it.
When you say "Can I get first screenshots?" I'm assuming you mean the "first" screenshots and not send the screenshots to *me* before anyone else, right?
Jim posted som pics of the real tank he has set up in one of the other threads in the Freshwater section. That's about as much information that has seeped out so far.
/Tiny Update