Another shot from underneath.

A single arm...

... and in close-up...

Watching us...

A nice vertical pose.

All puffed up, looking huge and menacing.

Hiding on the underside of a rock .

Trying to open a clam. The blue spot/ring is a characteristic marking of this species, the "bimac" or "two spotted" octopus.

A better shot of his spot. Notice the complex colors and mottling.

Another shot of his spot.

The spot really does glow like this, probably because of fluorescent pigments.

Here, the body is almost white, and the spot is washed out.