Iciligorgia rubra 
Intermediate Valley Coral 
Isopora palifera 
Knobby candelabra 
Knotted fan coral 
Lace coral 
Lacuna Coral 
Lapidogorgia cimenia 
Large flower coral 
Largebrain Root Coral 
Larger star coral 
Leaf plate montipora 
Leather Coral 
Leather Coral Sinularia gibberosa 
Leptoseris explanata 
Leptoseris gardineri 
Leptoseris tubulifera 
Lesser Valley Coral 
Lobactis scutaria 
Lobed Cactus Coral 
Lobophyllia serrata 
Long-tentacle Plate Coral 
Madrepora Carnation 
Magnificent Sea Anemone