Goldfish Salvation Project by Riusuke Fukahori
These blew my mind. Riusuke Fukahori, a japanese artist has developed a painting technique that makes you think you're seeing actual fishes inside water. When I say this I was really amazed, but when I watched the video, my head went through the roof.
Check these out with attention... try to imagine how he does it, and then, watch the video. When the pours the acrylic paint inside the recipients the magic happens and it's truly amazing. For more information on Riusuke's art you may check his personal website, which it's in japanese, but you could browser-translate it. I hope you these blow you mind. Cheers! ;)
The artist doing some pieces
More on the technique