chromatophores » http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/C/Chromatophores.html

BioMimetic

• http://www.nature.com/nsu/030106/030106-5.html
• http://www.nature.com/nsu/030317/030317-1.html

polymer based

• http://www.chem.utoronto.ca/gradinfo/research/polymer.html

other cephlapods include a range of octopuses (or 'octopi' for those who conflabulate grekolatiniun) and the Magnapinna Pacifica

cephbase » http://www.cephbase.utmb.edu/