Parrotfish are colorful marine fish known for their beak-like teeth, which resemble a parrot's beak. They primarily inhabit coral reefs in tropical and subtropical waters. Parrotfish play a crucial role in maintaining reef health by grazing on algae, which helps prevent algae overgrowth that can harm coral. These fish are also known for their unique ability to change color and sex during their lifetime. Parrotfish can produce a protective mucus cocoon while sleeping, which helps shield them from predators. Their vibrant colors and interesting behaviors make them a popular subject for marine enthusiasts and divers exploring coral reefs.