TONMO.com member rudiger has provided us with this spectacular photograph of his octopus. Says rudiger:

The picture is of an O. bimaculoides, who has been living in my 40 gallon tank for the past 5 months.

Click the image to enlarge.

http://www.tonmo.com/images/photos/thumbs/rudiger-octopus_sm.jpg (http://www.tonmo.com/images/photos/rudiger-octopus.jpg)

Thanks for the contribution!