Are there worms in tequila, and if so, what is their significance or purpose in the drink?

Yes, there are worms in some types of tequila, specifically in bottles of mezcal. The worm, known as the "gusano," is actually a larva of a moth that infests agave plants. In traditional Mexican folklore, the worm is believed to enhance the flavor and quality of the mezcal. However, in reality, the presence of the worm is more of a marketing gimmick and has no significant impact on the taste or quality of the drink.