Call it a case of mistaken identity. When it comes to camouflage, chameleons get all the attention. But the often-overlooked cuttlefish is the real master of disguise.  Cousins of the squid and octopus, cuttlefish are among the most unusual animals on our planet.  These shape-shifting creatures can hypnotize their prey, impersonate the opposite sex and even kill with lightning-fast speed. More accomplished masters of disguise than any chameleon, they have an incredible ability to morph their skin color ñ even their shape ñ to blend into most any background.  Cuttlefish also have one of the largest brain-to-body ratios among the invertebrates.  With stunning underwater footage and in-depth expert interviews, NOVA gets up close and personal with this astonishing brainy bunch.Special DVD features include: materials and activities for educators; a link to the NOVA Web site; scene selections; closed captions;  and described video for the visually impaired.     On one DVD5 disc.  Region coding: Region 1.  Audio: Dolby stereo.  Screen format: Letterboxed.