A practical packing checklist for low-impact dive and snorkel trips, covering reef-safe sunscreen, reusable kit, permits, insurance and lower-carbon travel choices.

Standing on coral, feeding fish and chasing wildlife are easy habits to pick up and hard on the reef. Here is how to snorkel without causing damage.

Volunteer placements and pay-to-conserve trips both put you on a reef, but they ask different things of your wallet and your skills. Here's how to choose well.