By using ayapak, and you shall eat the teeth cleaning and other corals 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.
The beak scraping 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.
Using a beak scraping eat corals. 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.