Woo, bioluminescence! It's a simple composition, but it was good for trying out some notions I had about painting dim lighting.
It's also Mushishi fan art of the snail-like mushi from the episode "Tender Horns." The Ah (coiled clockwise) devour sound, and the Un (counterclockwise) feed on silence.
If you like old fashioned fairytales or if you love seeing animation with pretty background paintings then I highly recommend this anime. It's even available to watch free (and legally!) online from funimation [link]
and hulu [link]
Mushishi is written by Yuki Urushibara.