Answer: coralline

AnswerCrossword Clue
CORALLINEType of atoll composition.
CORALLINELike many reefs
corallinea marine animal, esp a bryozoan, which lives in colonies resembling coral
corallinecoral-colored; reddish-yellow; light yellowish-red; pinkish-yellow
corallinecomposed of coral or having the structure of coral
corallinecorallike