A number of resorts let guests take part directly in marine conservation work rather than just observing it — see our sustainable tourism guide for the wider picture, and this page for what a guest can actually do hands-on.
Coral restoration activities
The most common guest-facing activity is helping plant or monitor coral fragments on a frame later transplanted onto damaged reef sections — a genuinely hands-on introduction to reef restoration, typically run by a resort's in-house marine team.
Research-led programs
Four Seasons Landaa Giraavaru in Baa Atoll is a clear example already in this directory of a resort with a dedicated marine research operation, including manta ray research guests can engage with directly — a deeper level of involvement than a standalone coral-planting activity.
What to actually check
Programme depth varies significantly resort to resort — a resident marine biologist running published research is a different thing to a single guest activity with limited scientific follow-through. Asking directly about a resort's marine team and any research output is a reasonable way to gauge genuine substance versus a marketing-led activity.