Well, re-announces, I guess. The game was officially unveiled at least year's TGS under the title of "Aqua", and we didn't know much about it other than that it involved looking at fish...and stuff.
Anywho, Sony recently put up a new official website, which shows that the game will be released in japan on September 25 for 5,980 yen. A release outside of Japan is as of yet uncertain, but it, along with Afrika which is hitting Japan on August 28, will probably make it over to NA/EU eventually.
Here are some screens from last year's TGS:



I like to think of the game as "Afrika: Deep Sea Edition". :P








