The South African mantis is known in New Zealand as the Springbok mantis. It is usually green, but does occur in a range of colours from green to brown. This one was on the wall inside our house and when I put it outside it matched perfectly with these dead oak leaves.
The next day the octopus was more relaxed about the camera and accepted a crushed oyster from me. After eating the flesh it "put" the shell very precisely to the side of the den entrance. Note the shrimp in attendance - a number of shrimps and triple fin fishes shared the rock pool with the octopus. It ignored them, and they were unafraid of it while taking advantage of the food scraps I had put in the water.
Every octopus encounter is unique, but a common theme is their interest in the GoPro camera I use for underwater photos. I think it is most likely the flashing light that attracts them. They often grab it and start a tug of war with me.
This page highlights one photo from each outing. The subjects will vary - it will be whatever caught my eye or was most special on that day.