Tuna is a term used in sigmology. It is a term for the object of measurement of aura, rizz or other such points. By the object of measurement is understood e.g. user, Robloxian, country, social group or object on which it is performed. This term was first used by Yellow Puma, who a few weeks after creating the sugmometer spontaneously defined the users on it. Since then, this term has been used to refer to any objects that appear on both the aurometer and rizzometer.