Is there a worm in tequila, and if so, what is its significance or purpose?

Yes, there is a worm sometimes found in bottles of mezcal, a type of Mexican liquor similar to tequila. The worm, known as a gusano, is actually the larvae of a moth that infests agave plants. Its presence in mezcal is more of a marketing gimmick rather than serving any specific purpose or significance in terms of taste or quality. Some believe that consuming the worm can bring good luck or have hallucinogenic effects, but these claims are not scientifically proven.