NOAA lists 20 coral species as threatened under the endangered species act.

[Zoaelite]

For those interested the list includes:

Acropora cervicornis (Staghorn)
Acropora palmata (Elkhorn)
Mycetophyllia ferox
Dendrogyra cylindrus
Orbicella annularis
Orbicella faveolata
Orbicella franksi
Acropora globiceps
Acropora jacquelineae
Acropora lokani
Acropora pharaonis
Acropora retusa
Acropora rudis
Acropora speciosa
Acropora tenella
Anacropora spinosa
Euphyllia paradivisa
Isopora crateriformis
Montipora australiensis
Pavona diffluens
Porites napopora
Seriatopora aculeata