Parrot beak to scrape another teeth and eating coral in the throat. Which when abrasives to gnaw it as sound. Time taken to take a powder, sludge, which is beneficial to the coral reefs.
NIB pincers used to scrape eat coral. And another set of teeth in the throat. When it was a sound bite. Take time to take out the powder sediments, which are beneficial to the reef.
The beak used to scrape some coral. And there is another set of teeth in the throat. When the nibble it is sound. The time taken to piss off powder of sediment, which is beneficial to the coral reef.