Why some animals don't have teeth?

Some animals lack teeth due to their dietary adaptations and evolutionary paths. For instance, certain herbivores have evolved beaks or specialized mouthparts to efficiently process plant material, while others, like jellyfish, use stinging cells to capture prey without the need for teeth. Additionally, some aquatic animals, like certain species of fish, have evolved to filter feed or rely on other methods of obtaining food that do not require teeth. These adaptations allow them to thrive in their specific environments despite the absence of teeth.