Crossword Genius

Biodiverse underwater ecosystem (4)

Ross

I believe the answer is:

reef

(Other definitions for reef that I've seen before include "Great Barrier formation?" , "Hazard for ships" , "Submerged barrier" , "Gather up" , "Underwater ridge or kind of knot" .)

I've seen this clue in The New York Times.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.