Halfnut was one of the Ravagers who were hired by the Sovereign to kill the Guardians of the Galaxy. Once on Berhert, Halfnut killed a spider-like alien and ate it. Soon after, one of Rocket Raccoon's booby traps were activated and Halfnut was struck with a tranquilizer dart.
Taserface rebelled against Yondu Udonta, so Halfnut decided to side with him, executing any Ravagers still loyal to Udonta causing Kraglin Obfonteri to refuse to help them anymore. Together with Groot and Rocket Raccoon, Udonta escaped from the cell and arrived into the hanger bay of the ship, then Udonta's Yaka Arrow slaughtered the Ravagers, Halfnut included.