relaxing wii title made by akira, a company that is known for everblue 1 and 2 on ps2. The game is pretty much completely underwater exploration.
So far it is pretty hard to find in the states, it did just get released on the 21st.
Anyhow it has wifi for multiplayer exploration, two player co-op(?), custom soundtrack via SD card and it is one of the touch generations, so I assume it is fairly easy. The game just looks so relaxing and mellow and quite a change from most of typical FPS shooters and RPGs that are out.