Another ceph encounter. Yesterday I followed an octopus swimming to escape from another diver. The octopus landed on a coral head and immediately morphed into a coral head. Had I not known it was there, I would never have seen it. When I got too close, the octopus let go, quickly changed to sand color, and swam off to another coral head. This time it went under the coral to a small overhang. I watched it inch its way under the coral. By the time I got to there and looked under the ledge all I could see was its BEAK and behind it, the breathing hole opening and closing. I watched for a few minutes, marvelling at the amazing creature. Did I mention he was missing half an arm? Poor boy!