Crossword clue
“Endangered underwater ecosystem”
This clue appeared as 60-Down in the NYT Crossword on Monday, September 29, 2025. The answer has 4 letters.
Answer · 4 lettersFirst appearance
REEFLetters4
Starts withR
Ends withF
Vowels2
Where this clue has appeared
About this clue
The clue “Endangered underwater ecosystem” ran in the NYT Crossword on September 29, 2025 as 60-Down. Its answer is a 4-letter word that starts with R and ends with F.
See every answer from the puzzle on the NYT Crossword page for September 29, 2025, or learn how clues like this work in our guide to crossword clue types.
More clues from this puzzle
FAQ
What is the answer to the “Endangered underwater ecosystem” clue?+
The answer is REEF (4 letters), from the NYT Crossword of September 29, 2025.
Where has this clue appeared?+
We have seen it 1 time in the NYT Crossword.
How do I find other NYT Crossword answers?+
Open the full list of answers for September 29, 2025, or browse every date on the NYT Crossword hub.