The Dominican Republic gets written about mostly as a beach destination, which undersells what's happening in its waters. This is a country that has placed more than 30% of its territorial seas under protection — meeting a global biodiversity target that most coastal nations are nowhere near — runs a coral restoration program that international research institutions now use as a testing ground, and protects one of the most important humpback whale breeding grounds on Earth in a sanctuary larger than Costa Rica. It also has serious enforcement gaps, an overfishing problem, and a waste management system under strain. Both things are true. This is a working overview of marine conservation here: what exists, what it has achieved, where it falls short, and what a visitor can realistically do.
The Silver Bank Whale Sanctuary
The single biggest thing the Dominican Republic has done for the ocean is protect the Silver and Navidad Banks, north of the island. Every winter, most of the North Atlantic humpback whale population migrates there to breed and calve — it is the primary nursery for the entire population. The Marine Mammal Sanctuary protecting it was one of the first of its kind anywhere, established in 1986, decades before marine protected areas became a standard policy tool.
In April 2024 the government announced a major expansion, nearly doubling the sanctuary to more than 64,500 square kilometres. Combined with its other marine protected areas, that expansion put the DR among a group of just over 30 coastal states worldwide that have protected at least 30% of their territorial waters — the target the Kunming-Montreal Global Biodiversity Framework set for 2030. The DR got there roughly six years early, which is not a common position for a middle-income country.
The whale watching that happens in Samaná Bay between January and March runs under regulation as a result — permitted operators, limits on boat numbers and approach distances, and defined observation windows. It is one of the clearest examples in the country of tourism revenue being tied directly to protecting the thing tourists came to see.
Coral Restoration That Punches Above Its Weight
The DR's coral restoration programs deserve their own article, and we've written one, but the short version belongs here. FUNDEMAR, based in Bayahibe, has run coral nurseries since 2011 with documented fragment survival of 87% over twelve months. It has cultivated eight coral species through assisted sexual reproduction, including pillar coral, which very few programs anywhere have managed to breed. In 2023 it operated five floating larval nurseries simultaneously at one site — a first for the Caribbean.
Closer to Punta Cana, Fundación Grupo Puntacana runs its own nurseries under the PESCA program, and supplied much of the founding genetic stock for the Bayahibe operation. Both work with SECORE International, and FUNDEMAR now hosts technology transfer work with the Australian Institute of Marine Science. A Dominican foundation being the site where Australian reef technology gets trialled for the Caribbean is a reasonable measure of where this work sits internationally.
Marine Parks and the Enforcement Gap
The DR's protected area system includes several marine and coastal parks that matter for divers. Parque Nacional del Este, covering the waters around Saona and Catalina islands near Bayahibe, protects some of the healthiest reef in the country. La Caleta Underwater National Park near Santo Domingo is a small but well-known dive site built around deliberately sunk wrecks. Jaragua National Park in the southwest protects a large stretch of coast including sea turtle nesting beaches. Montecristi in the northwest protects reef and mangrove systems.
Here is where honesty is required. A protected area on a map is not the same as a protected area in the water. The DR, like most of the region, has more designated protection than it has patrol boats, rangers, and prosecution capacity. Illegal fishing inside protected zones happens. Enforcement is inconsistent and depends heavily on which park, which season, and what resources are available that year. Researchers describe the general Caribbean pattern as paper parks — legally protected, practically under-managed — and the DR is not exempt from it.
That is a criticism of capacity rather than intent, and it is worth understanding rather than dismissing. Protection frameworks are a precondition for enforcement, not a substitute for it. The DR has built the framework. The funding and staffing to make it fully operational is the unfinished part, and it is where most of the country's conservation NGOs put their effort.
Fisheries, Lionfish, and Community Programs
Overfishing is the pressure that most directly shapes what you see underwater here. Caribbean reef fish populations have declined broadly across the region, and the DR's artisanal fishing sector — thousands of small-boat fishers working close to shore — operates under limited regulation and considerable economic pressure. Seasonal closures exist for species including lobster and conch, but compliance and monitoring are uneven.
The more encouraging development is the shift toward working with fishing communities rather than around them. FUNDEMAR's restoration program was built from the start on local participation — fishermen, boat captains, and dive guides trained and employed in the work — and several of its long-serving staff came into conservation from fishing. That model does two useful things at once: it creates conservation jobs in communities that would otherwise bear the cost of restrictions, and it puts people with genuine local knowledge of the water into the work.
Lionfish control is another area where dive operators, fishers, and conservation groups have found common ground. The invasive Indo-Pacific lionfish has no natural predators in the Caribbean, reproduces year-round, and eats juvenile reef fish at a rate that measurably depresses local populations. Culling programs and a push to establish a commercial market for lionfish as food both run in the DR, and they are among the few interventions where recreational divers can contribute directly under proper training and permits.
Waste, Plastics, and the New Legal Framework
Solid waste is the DR's most visible environmental problem and a direct source of marine plastic pollution. Collection coverage is incomplete, formal recycling capacity is limited, and rivers carry accumulated waste to the coast during heavy rain — which is why beaches can be clean one week and strewn with debris after a storm.
The legal framework has moved. Law 225-20 established integrated solid waste management, and Law 98-25 amended it with a phased ban on foam and single-use plastics beginning in 2026, giving producers a staged timeline to adapt. The DR is also a signatory to the UN Environment Programme's Clean Seas campaign and has deployed river bio-fences — barriers made partly from recovered debris that intercept waste before it reaches the sea. Whether the plastics phase-out is enforced as written is the open question, and it's worth watching over the next few years.
Where Tourism Helps and Where It Hurts
Tourism is the DR's largest industry, and its relationship with the ocean cuts both ways. Coastal development has destroyed mangroves and altered shorelines. Resort construction increases sediment runoff onto reefs. Cruise and excursion traffic concentrates pressure on a handful of sites. Sunscreen chemicals, anchor damage, and diver contact all add up.
But tourism is also the reason the reef has economic value to anyone other than a fisherman. FUNDEMAR's restoration program is funded substantially by hotels and dive centres in the Bayahibe area — the first hotel partner signed in 2011 and formal agreements with most local operators followed. Whale watching regulation in Samaná exists because whale watching is worth money. The reason coral restoration attracts funding here at all is that reefs draw visitors. Conservation that pays for itself survives budget cycles; conservation that doesn't, generally doesn't.
What Visitors Can Actually Do
The most useful thing is unglamorous: dive and snorkel properly. Buoyancy control, no reef contact, gear clipped, reef-safe sunscreen, and no touching or chasing marine life. On a busy site, the cumulative difference between divers who do this and divers who don't is measurable over a season.
Beyond that: choose operators who brief on conservation and use mooring buoys rather than anchoring; donate to FUNDEMAR or Fundación Grupo Puntacana if you want your money going to restoration work; eat lionfish when a restaurant offers it, since demand supports the culling economy; skip captive animal attractions; refuse single-use plastics where you can, particularly straws and bottles; and if you dive with a camera, consider submitting sightings to citizen science platforms where researchers can use them.
One thing worth saying plainly: none of this substitutes for the structural issues. Reef decline in the Caribbean is driven primarily by warming water, disease, and land-based pollution, and no amount of careful diving offsets that. Visitor behaviour matters at the margin, and the margin is where reefs currently are. That is a reason to bother, not a reason to overstate the effect.
The Bottom Line
The Dominican Republic has more marine conservation infrastructure than its reputation suggests: over 30% of territorial waters protected, a 64,500 km² humpback sanctuary expanded in 2024, a coral restoration sector working at international standards, and a legal framework now phasing out single-use plastics. It also has an enforcement gap, an overfishing problem, and a waste system that puts plastic in the sea every rainy season. The programs that work here work because they are locally staffed and economically connected to tourism rather than imposed from outside. If you're diving with us and want to know what the reef in front of Cabeza de Toro actually looks like right now, or how to see restoration work during your trip, message us through our contact form with your dates.
