447K views · 4.1K reactions | As the common reef #octopus (Octopus cyanea) moves across the coral reef, it uses chromatophores to change its coloring and appearance to match the substrate beneath. These color changes are sometimes created to mimic a dark shadow passing across the surface — in hopes that a crab may let its guard down and become a snack.  #ocean #science | Science Channel | Facebook

36K views | Josh joined the Marines after the 9/11 attack happened. He was only 19. Now as a veteran, he uses his guitar as an outlet to protest about the ways soldiers get neglected after the war. | Only Human | Facebook