These files contain the acoustic data from camouflage groupers (Epinephelus polyphekadion) and squaretail coralgroupers (Plectropomus areolatus) at the Ngerumekaol Spawning Aggregation site (also known as Ulong Channel) in Palau. Data are from Vemco V16 transmitters implanted in the groupers and passively recorded using Vemco VR2 hydrophones.