Here's an octopus. Sometimes they don't want to be seen when they move because predators can see them.

Graffiti portraying President Morsi as an octopus swimming in a sea of blood.

and an octopus. Ain't that amazing? Now, Roger spooked him so he took off in a cloud of ink, and when he lands the octopus says, Oh, I've been seen.

This is an octopus this is the work of Dr. Roger Hanlon at the Marine Biological Lab and it's just fascinating how cephalopods can, with their incredible eyes, sense their surroundings, look at light, look at patterns.