Tube grubs were a type of small animal lifeform, popular as a Ferengi food. (DS9 episode: "The Nagus", et.al.) Tube grubs have a lifespan of ten weeks. Prepared as foodstuff and chilled, they have a shelf life of seven months. (DS9 reference: Legends of the Ferengi) Tube grubs were available at Quark's on Deep Space 9's Promenade. (ST reference: Star Trek Cookbook) Depruu Grub Emporium was recognized for breeding the finest tube grubs in the Alpha Quadrant. (DS9 - Worlds of Star Trek: Deep Space Nine novel: Ferenginar: Satisfaction is Not Guaranteed)