Many a Coral Sea island (5)
I believe the answer is:
atoll
(Other definitions for atoll that I've seen before include "Circular coral reef" , "tropical island" , "Ring of coral" , "Bikini, perhaps" , "land threatened by rising sea levels" .)
I believe the answer is:
atoll
(Other definitions for atoll that I've seen before include "Circular coral reef" , "tropical island" , "Ring of coral" , "Bikini, perhaps" , "land threatened by rising sea levels" .)