After a few moments, this little one realized I wasn't buying the flounder impression, and begain to puff up and change pattern...(see next photo in gallery)

...a Long-armed sand octopus moving to "plan b"...when mimicry and camoflauge don't work...try to look large and dig yourself a hole in the sand!

Close encounter with an alien intelligence. Oval squid (Sepioteuthis lessoniana)