An underwater rainbow © Steven Kovacs/Minden Pictures
You might look twice if you passed by this Technicolor sea creature gliding through the ocean water. In celebration of World Octopus Day, we"re marveling at a photograph of the rarely seen blanket octopus, near Palm Beach, Florida. The blanket octopus gets its common name from the sheets of webbing that stretch between some arms of the female, like the one pictured here. When threatened, it spreads out its arms, creating a blanketlike silhouette to intimidate would-be attackers.