Ocean reef material (5)
I believe the answer is:
coral
(Other definitions for coral that I've seen before include "Pink - lobster roe" , "rock, perhaps" , "Pink marine substance" , "Hard substance on the seabed" , "Tone" .)
I believe the answer is:
coral
(Other definitions for coral that I've seen before include "Pink - lobster roe" , "rock, perhaps" , "Pink marine substance" , "Hard substance on the seabed" , "Tone" .)