To clarify, as I don't know if you know this, the artist actually paints 3d-looking things on layers of resin in stuff. So, the stick and the leaf are probably clay or some other sort of sculpture, and then he poured some resin in the leaf, it dried, he painted a little bit of the fish, poured a bit more of the resin, painted more of the fish, and so on.
So what you see here is a picture of the painting/sculpture thing outside on concrete. It's not just a flat painting. You can tell better in pieces like this: fav.me/d51rjif It's a really interesting technique and I don't fully understand it myself, I just wanted to help you guys get the idea. :>