Crossword Genius

Marine formation (5)

Ross

I believe the answer is:

coral

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">marine formation</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>

(Other definitions for coral that I've seen before include "Pinkish-orange colour" , "certain islands" , "Creature building reef" , "Shade of pink" , "(Massed skeletons of) tiny invertebrate" .)

I've seen this clue in the Newsday and The Mirror.
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