SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY
Octopus suckers. Coloured scanning electron micrograph (SEM) of suckers on an octopus (order Octopoda) arm. The suckers are used to grasp prey when hunting, and also to manipulate the objects (such as rocks) used to build their dens. The suckers also have chemoreceptors that allow an octopus to taste what it is touching.
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