An Ahch-Tonian grub was a species of animal that was indigenous to the secluded world of Ahch-To. The Wookiee named Chewbacca one time tried employing these grubs to lure in aquatic animals on the world, but discovered that there were no aquatic animals to capture due to the cold time of year. Porgs liked consuming these grubs as sustenance, however Chewbacca detested the grubs, as did Wookiees as a whole.