Bonaire
A pioneer and the model for other islands, it's been charging divers $10 a year since 1992 to coffer management costs, including educational programs and patrols.

Bunaken, Indonesia
The local dive operators association lobbied to have a fee imposed, and the revenue has been used to reduce cyanide- and blast-fishing.

Cayman Islands
Its conservation laws are among the most rigorous in the Caribbean???the penalty for a vessel found polluting the water is up to $625,000.

Chumbe Island, Tanzania
The eco-resort on this privately managed coral island won a Cond?? Nast Traveler Ecotourism Award in 2001.

Cozumel
The $2 daily fee is used to educate and certify guides.

Great Barrier Reef
Comprising about 3,000 reefs and coral shoals, this enormous park is managed by representatives from Australia's federal, state, and local governments.

Hol Chan, Belize
This park is carefully monitored and managed, although much of the coral has not recovered from 1998's double blow of El Ni??o and Hurricane Mitch.

Hon Mun, Vietnam
The country's first protected marine area, it was created by the Vietnamese government in collaboration with the World Conservation Union.

Kiunga Marine National Reserve, Kenya
Many locals rely on fishing for their livelihood but are also involved in safeguarding this marine habitat.

Komodo National Park, Indonesia
This reserve, which consists of several islands, adopted a management plan in 2000 and now aggressively regulates fishing and other activities.

Mafia Island, Tanzania
Thanks to conservation efforts by locals and the World Wide Fund for Nature, its coral is in good condition.

St. Lucia, South Africa
At this, one of the most popular dive parks in southern Africa, visitor access is tightly controlled.

Tubbataha, Philippines
With some of the healthiest reefs in the country, Tubbataha is a UNESCO World Heritage Site.