Bali is gaining popularity as both a scuba diving and freediving destination. The two sports offer fundamentally different relationships with the ocean.
Scuba diving: breathe from a tank, stay underwater for 45-60 minutes, gradual exploration, see more marine life due to time underwater, equipment-intensive, easier to learn basic skills.
Freediving: single breath, surface between dives (typically 1-3 minutes underwater), more meditative/athletic, marine life may be more curious (no bubble noise), minimal equipment, requires breath-hold training.
For marine life encounters: scuba wins for quantity and variety. Longer bottom times mean more sightings. However, some freedivers report closer encounters because the absence of noisy bubbles makes marine life less skittish.
For Bali specifically: scuba diving has more infrastructure, more dive sites designed for tank divers, and more standardized safety protocols. Freediving in Bali is growing, with training centers in Amed and Tulamben.
Our recommendation: if you have never done either, start with scuba diving for a more accessible and comprehensive introduction to the underwater world. Try Discover Scuba first, and if the meditative/athletic aspect appeals more, explore freediving later.