Why I don't like Tumblr: mystery cephalopod islands

While preparing the latest Scumble round-up of science-art, I wanted to include this amazing image:

© an unidentified artist - who is it?

It was "liked" and shared via Google Reader from someone I follow.  Note, there's no visible signature on the image. It was shared from here, a Tumblr blog, and it looks like it originally was posted here.

My purpose here is not to single out this specific Tumblr blogger. Tumblr makes it easy to reblog an image, even one that has no attribution to its original creator. And this very cool surreal image of an island town built on an octopus has been reblogged and liked 535 times. Without the artist getting any credit at all.

The problem is not the Tumblr software, it's the culture of re-posting without respect to the image creators that has developed on Tumblr. It's so quick, most people posting images don't write anything at all, no title for their post, no comments on why they liked it, nothing.

There is some hope that this disrespect is recognized in the Tumblr community: Reblogged To Give Credit seem sto care. (Check out the url.)  There are others too.

As readers of The Flying Trilobite know, I sometimes advocate for better image attribution on blogs. It's a problem. Images are treated as important and noteworthy, but their creators are often treated as unimportant and worthless.

I realize I am being a hypocrite for re-posting this image yet again - indeed, in the past I've parted ways with my Art Evolved peeps on whether or not it's a good idea to post unattributed images in the hopes of repatriating their ownership.  But I thought I would try to re-post it the same way Art Evolved does on occasion: in the hopes of finding out from my readership if anyone knows who the talented artist is behind it. So far, my Google-fu fails me. I've tried "octopus island", "cephalopod fantasy painting" and about 10 other combinations, and no luck.

One of the Tumblr blogs had an interesting link I hadn't seen before: to a site called TinEye which searches for images and tells you where their being used. I put Darwin Took Steps into it, and TinEye matched the image to me as the most likely source.
Unfortunately, no joy for the Octopus Island.

Anyone recognize the artist behind this?
Any other artists find more trouble with Tumblr than other platforms?

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Original artwork on The Flying Trilobite Copyright to Glendon Mellow