Coral reef producer (5)
I believe the answer is:
polyp
(Other definitions for polyp that I've seen before include "Coral form" , "Small tumour" , "Sea anemone, for example" , "Small growth (medical)" , "Minute reef-building creature" .)
I believe the answer is:
polyp
(Other definitions for polyp that I've seen before include "Coral form" , "Small tumour" , "Sea anemone, for example" , "Small growth (medical)" , "Minute reef-building creature" .)