An Arachnosaur is a fictional creature that exists in the Planet Swoof fantasy setting in the Smurf Village Imaginarium in the EMPATH: The Luckiest Smurf story series. It is a creature that is believed to be a cross between a dinosaur and a giant spider, which is considered dangerous around its prey. In the story "Dreamy's Birthday Wish", both Psycheliana and Miracle helped the Swoofs fight off such a creature that was threatening the Swoof Village.