This is one of those lovely little projects where I can and have put it on and left it running while drinking my beer. The graphics are great and I like the little things you've added such as the shark that circles around and the little wisps.
Even the night sky is pretty cool and as for the cloud like things at the edge that just change shape just adds to the coolness.
But do you what would make this even more cooler? Change time in realltime to cover a 24 hour clock and then add some slight random movements so you can just "Sit back and watch it and forgot about all your troubles."
Really neat :) or as we say in Yorkshire "Top Notch".