Maybe a little simple, it's very nice, but you should try changing its location or doing something a bit more complicated. Good luck!

This kinda reminds me of the story of the fish and the bird who fell in love but the fish could not live in the air and the bird could not live under water. So they were eternally sad. But I think the location is perfect. And the light source and the beams are well done. I would, however add some other underwater elements. Really excellent job on the surface, too. I will hold off on my vote in case you decide to add more underwater stuff to it.

wow awesome!

You could add a water ripple to the entire building to give it a more under water effect... just be careful not to over do it.. sound Idea all round though

This is very well done but I feel it's missing something. Add some more atmoshpere. Maybe find some sources of fish, shipwrecks and/or underwater plants. This entry really has the potential to go that little bit further.

You say you have used no external sources but you have linked one anyway. Explain?

neat colors