The Coconut Crab has become extinct in may areas where people live. The Coconut Crab is the only species of the genus Birgus and is related to the terrestrial hermit crabs of the genus Coenobita ~ [Wikipedia]
Art and science have always moved forward hand in hand; with advances in technology being adopted and adapted by artists in order to portray the world around them in new and better ways. See how award winning wildlife filmmaker John Downer is continually pushing at the technological boundaries of image capture technology in his quest to bring us a more intimate view of the animal world.
The coconut crab, (Birgus latro), is a species of terrestrial hermit crab (see this post), also known as the robber crab or palm thief. It is the largest land-living arthropod and that's why it can't be "In An Octopuses Garden".