ANIMALS - True colors: Female squid have two ways to switch color

The female common market squid –– AKA Doryteuthis opalescens –– may not be so common after all. Researchers at UC Santa Barbara have discovered that this glamorous cephalopod possesses a pair of stripes that can sparkle with rainbow iridescence. These flank a single stripe, which can go from complete transparency to bright white ...

http://phys.org/news/2013-09-true-female-squid-ways.htm