Passive acoustic measurements of coral reef “soundscapes” can be an effective way of tracking biological activity and may help assess community-level biotic diversity. While a reef soundscape may vary both temporally and spatially, this variability is often not well understood. To investigate this, we deployed multiple digital acoustic recorders (DMONs) for both short- (24-h) and long-term (4 months) investigations at three patch reefs that varied in coral cover (low, intermediate, and high levels) in the U.S. Virgin Islands National Park (sample rate: 120 kHz). The short-term investigation consisted of four continuously recording instruments spaced at ~20 m intervals. Long-term measures included two recorders per reef on a duty cycle of 2.5 min/2 h. Fish and coral diversity, ambient light intensity, temperature, and salinity were also measured. Results indicate diel patterns in snapping shrimp signals (dominant energy between 2.5 and 20 kHz) with peaks at dusk and dawn. Sound pressure level (SPL) of the snapping shrimp band varied spatially within and among reefs, with higher maximum SPL at reefs with low and intermediate coral cover. However, within-reef SPL variability was lowest at the site with high coral cover. Temporal patterns in snapping shrimp acoustic activity were correlated within and among all three reefs.