Night dive

A dive after dark by torchlight, revealing hunting predators, sleeping fish, and bioluminescence on reefs you thought you already knew.

A night dive is simply a dive made after dark, but the ocean it reveals is a different place. Day fish sleep in crevices, sometimes in mucus cocoons like parrotfish, while the night shift emerges: hunting morays and octopuses, lobsters and crabs marching in the open, basket stars unfurled, and coral polyps extended to feed. Your torch beam becomes a spotlight on a stage.

Standard practice is a primary dive light plus a backup, a marker light on each diver or the exit point, and simplified light signals: a slow circle for OK, side-to-side sweep for attention. Sites are usually shallow, familiar, and calm, often the same reef you dived that afternoon, which makes navigation manageable in a torch-width world. Move slowly; beams attract plankton, which attracts feeding fish, and at some sites like Kona's manta night dive, the plankton draw is the entire show.

Cover your light for a minute in mid-water and wave a hand to see bioluminescent sparks, the reliable finale of a good night dive. A night rating or guided experience is required by many operators, and the first one is a milestone worth a detailed log entry. Keep your beam out of other divers' eyes and off resting animals after a brief look.