coral reef
US /ˌkɔːr.əl ˈriːf/
UK /ˌkɔːr.əl ˈriːf/

1.
recife de coral
a ridge of rock in the sea formed by the growth and deposit of coral
:
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Divers explored the vibrant coral reef teeming with marine life.
Os mergulhadores exploraram o vibrante recife de coral repleto de vida marinha.
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Climate change poses a significant threat to coral reefs worldwide.
As mudanças climáticas representam uma ameaça significativa para os recifes de coral em todo o mundo.