A closer look
In a masterclass of evolutionary espionage, the Hawaiian bobtail squid literally swallows bioluminescent bacteria to turn itself invisible. By capturing Vibrio fischeri in a specialized light organ, the squid matches the exact intensity of the moonlight filtering down through the ocean surface. This biological cloaking device completely erases the squid's silhouette, hiding it from predators lurking in the deep below. It is a mutually beneficial kidnapping where the bacteria get free food, and the squid gets a biological invisibility cloak.
