Clue: What the beaklike teeth of a parrotfish are used to bite
Answer: CORAL
We have the answer here for April 21, 2025.

Explanation:
Parrotfish have strong, beaklike teeth that they use to bite into coral. This action allows them to scrape off algae and other tiny organisms living on the coral surface. The grinding of coral during feeding even contributes to the production of sand in tropical ecosystems.
In crossword puzzles, animal behavior clues often point to natural interactions. Knowing that parrotfish bite coral helps make this a clear and logical answer.
The content on this page was published as an answer to a puzzle question published on the NYT Crossword page. All rights of NYT Crosswords belong to The New York Times Company.