Short educational video showing GPO arms as it is bring fed:

http://www.mbayaq.org/efc/octopus.asp

And a recap of a GPO encounter during a REEF fish counting dive:

http://www.blueplanetdivers.org/archives/2005/10/the_octopus_tat.php

GPO fact sheet with a couple of interesting notes:
http://ir.library.oregonstate.edu/dspace/bitstream/1957/588/1/Great_Pacific_Octopus_ocr.pdf


Believe it or not, I am looking for an octopus knob/drawer pull but keep coming across other topics, this one from Hawaii:

http://www.susanscott.net/OceanWatch1996/may06-96.html