When people think about coral reefs, they often picture colourful fish, crystal-clear water and tropical holiday destinations. While reefs are certainly some of the most beautiful ecosystems on Earth, their true importance goes far beyond what we see while snorkelling or scuba diving.
Coral reefs are the foundation of healthy oceans. They support an extraordinary diversity of marine life, protect coastlines from erosion, provide food and livelihoods for millions of people and play an essential role in maintaining the health of our planet.
Yet despite their importance, coral reefs are disappearing at an alarming rate.
Understanding why coral reefs matter is the first step towards protecting them.
Coral reefs cover less than one percent of the ocean floor.
Despite their relatively small size, they support approximately 25% of all known marine species during some stage of their lives.
Fish, crabs, shrimp, octopus, sea turtles, eels and countless other marine animals depend on coral reefs for shelter, food and breeding grounds.
Without healthy reefs, entire marine ecosystems begin to decline.
Every reef is like an underwater city, filled with life, relationships and delicate ecological balance.
Many people don’t realise that coral reefs also serve as natural barriers between the ocean and the land.
Healthy reefs absorb the energy from waves before they reach the coastline.
This natural protection helps reduce:
Communities living near healthy reefs are often better protected during storms than those where reefs have deteriorated.
As climate change increases the intensity of storms around the world, this protective role is becoming even more important.
Millions of people around the world rely on coral reefs for food and income.
Many commercially important fish species spend part of their lives within reef ecosystems before moving into deeper waters.
Healthy reefs support sustainable fisheries by providing nursery habitats where young fish can grow safely.
When reefs decline, fish populations often decline as well.
Protecting reefs ultimately helps support coastal communities and food security for future generations.
Costa Rica is famous for biodiversity on land, but its marine biodiversity is equally remarkable.
The reefs along Costa Rica’s Pacific coastline provide habitat for an incredible variety of marine life.
Divers exploring these reefs may encounter:
Every species plays a role in maintaining the balance of the ecosystem.
Losing even a few key species can affect the health of the entire reef.
Although coral reefs are remarkably resilient, they are also extremely sensitive to environmental change.
Today, reefs face multiple pressures including:
These challenges rarely occur in isolation.
Instead, they often combine to place additional stress on reef ecosystems.
Without action, many reefs could struggle to recover naturally.
Healthy oceans also support healthy local economies.
Millions of people travel every year to experience coral reefs through scuba diving, snorkelling and marine wildlife tours.
In Costa Rica, sustainable marine tourism creates employment for:
When reefs thrive, communities benefit alongside marine life.
This creates a strong incentive for responsible tourism and conservation.
One of the greatest threats facing coral reefs is rising ocean temperatures.
Corals live in partnership with microscopic algae that provide much of their energy and vibrant colours.
When water temperatures remain unusually warm for extended periods, corals become stressed and expel these algae.
This process is known as coral bleaching.
Bleached corals are not immediately dead, but prolonged stress can leave them vulnerable to disease and mortality.
Reducing local stressors and supporting restoration projects can improve a reef’s ability to recover.
While protecting existing reefs remains the highest priority, restoration projects can play an important role in helping damaged reefs recover.
Coral restoration programmes often involve:
These initiatives do not replace natural conservation.
Instead, they help support ecosystems that are under increasing pressure.
Every healthy coral colony added back to the reef contributes to rebuilding habitat for marine life.
Marine conservation is not only about protecting wildlife.
It is also about protecting people.
Healthy oceans provide:
By protecting coral reefs, we are also investing in the wellbeing of future generations.
Conservation succeeds when local communities, scientists, businesses and visitors work together toward the same goal.
Scuba divers have a unique opportunity to become ambassadors for the ocean.
Every dive provides an opportunity to:
Even small actions can have meaningful long-term impacts.
Perhaps even more importantly, divers often become powerful advocates for marine conservation after experiencing healthy reefs firsthand.
You don’t need to be a scientist to support coral reef conservation.
Small actions can make a difference.
You can:
Collectively, these actions create positive change.
Coral reefs are among the most valuable ecosystems on our planet.
They support incredible biodiversity, protect our coastlines, strengthen local economies and inspire millions of people to connect with the ocean.
Their future depends on the choices we make today.
Whether you are a diver, traveller, student or simply someone who cares about the natural world, you can play a part in protecting these remarkable underwater ecosystems.
At Marine Conservation Costa Rica, we believe that meaningful conservation begins with education, grows through community and succeeds through action.
Join one of our marine conservation programmes, support our coral restoration projects or volunteer with us to help ensure that Costa Rica’s reefs continue to thrive for generations to come.
Because when we protect coral reefs, we protect far more than the ocean—we protect the future of our planet.
Dive with Me
What is it really like to volunteer on a coral restoration project? Follow a typical conservation day in Costa Rica, from preparing for nursery dives and monitoring coral health to marine cleanups, education and learning how reef restoration works.
Coral reefs support nearly a quarter of all marine life, protect coastlines and sustain communities around the world. Learn why these remarkable ecosystems matter and how marine conservation and coral restoration projects in Costa Rica are helping secure their future.
Discover the hidden wonders of turtles, nature's ancient mariners, and their incredible survival stories that span over 200 million...
Discover the hidden wonders of turtles, nature’s ancient mariners, and their incredible survival stories that span over 200 million years.
Turtles are more than just slow-moving reptiles; they are vital to our ecosystems and have been perfecting survival for millions of years. These fascinating creatures have witnessed the rise and fall of dinosaurs and continue to thrive in diverse environments, from the depths of the ocean to lush rainforests. Their unique adaptations and roles in maintaining ecological balance make them indispensable to our planet’s health.
One of the most astonishing abilities of certain freshwater turtles, like the Fitzroy River turtle, is their capacity to absorb oxygen through blood vessels in their cloaca. This remarkable adaptation allows them to remain submerged for extended periods, especially during hibernation. It’s a testament to their incredible evolutionary journey and survival tactics.
Sea turtles possess an extraordinary ability to navigate vast oceans using Earth’s magnetic field. This natural GPS allows them to return to their birthplace decades later to lay eggs. Each beach has a unique magnetic signature, which turtles imprint on as hatchlings. This geomagnetic imprinting is a testament to their incredible evolutionary adaptations.
When sea turtles appear to be crying on the beach, they’re actually excreting excess salt from their bodies. These tears are produced by specialized salt glands located near their eyes, which help maintain their internal salt balance after ingesting seawater. This adaptation is crucial for their survival in saline environments.
A turtle’s shell is more than just a protective armor; it’s an integral part of their skeleton. The carapace (upper shell) and plastron (lower shell) are fused with their spine and ribs, forming a sturdy structure. Each scute on the shell can reveal the turtle’s age and growth, much like rings on a tree. This unique anatomy highlights the evolutionary success of these ancient creatures.
Help us protect these incredible creatures by joining Marine Conservation Costa Rica. Your involvement can make a significant impact in preserving turtle habitats and ensuring their survival for generations to come. Dive into the world of turtles and be part of the solution today!
At Marine Conservation Costa Rica, we are thrilled to share an incredible milestone—since January 2025, our team of dedicated staff, interns, and volunteers has successfully planted 1,000 coral colonies on local reefs. What makes this achievement even more special is that we reached our annual goal months ahead of schedule.
These new colonies, representing six different coral species, are now thriving in our nurseries and on restored reef sites. Each one plays a crucial role in strengthening marine biodiversity, providing habitat for countless fish and invertebrates, and ensuring that Costa Rica’s coral reefs continue to support the health of our oceans for generations to come.
Coral reefs are among the most vital ecosystems on Earth. They act as nurseries for marine life, natural barriers against coastal erosion, and providers of food and income for millions of people worldwide.
Planting 1,000 coral colonies may sound like a number, but in reality, it represents a living, breathing future for our oceans. Each coral fragment we grow and transplant has the potential to expand into a healthy reef structure, supporting schools of fish, protecting coastlines, and restoring balance to the underwater world of Manuel Antonio and Quepos.
This achievement would not have been possible without the tireless efforts of our interns and volunteers. Each coral fragment planted is a testament to your hard work, dedication, and passion for conservation.
Whether you joined us for a few weeks or several months, your contribution has left a permanent mark on Costa Rica’s reefs.
We extend our deepest gratitude to everyone who joined our programs this year. Your energy and enthusiasm fuel our mission and inspire us to keep pushing the boundaries of what is possible in coral restoration.
If you’re inspired by this achievement and would like to join us, there are several ways to get involved:
🌊 Internships: You can also gain college credit with one of our partners when you complete an internship with us: Find out more through Intern International.
🤿 Eco Divemaster Program: Take your scuba training to the next level while contributing directly to reef restoration with Oceans Unlimited and our partners at Gapforce
Your journey with us doesn’t just enhance your diving skills—it helps protect and rebuild our ocean ecosystems.
If you are not a scuba diver or aren’t able to come visit then you can still help us with our coral restoration by taking part in our adopt a coral program.
You can choose to adopt either a colony or a whole reef if you would like and help us continue or work or restoring the reefs of Costa Rica.
While coral restoration is at the heart of our work, Marine Conservation Costa Rica is committed to a holistic approach to ocean conservation. Our other projects include:
📚 Marine education programs with local schools and communities.
🐠 Reef monitoring and surveys in partnership with global organizations such as REEF.org.
🌐 3D reef imaging projects, creating digital models to track coral growth and resilience.
🏝️ Community outreach initiatives that build awareness about marine protection and sustainable ocean practices.
By combining research, education, and restoration, we aim to create lasting change for both marine life and local communities.
Reaching our 1,000-colony goal early is not the end—it’s just the beginning. With your continued support, we are excited to push further, expand our nurseries, and strengthen our reefs.
Together, we can ensure that Costa Rica remains a global leader in marine conservation and that our oceans remain vibrant, diverse, and resilient.
To everyone who helped us reach this milestone: thank you. And to those who want to join our mission—there has never been a better time to dive in.
Be part of reef restoration in Costa Rica. Find out more about our progams and projects here.
Highly intelligent and masters of disguise, octopuses are some of the most captivating creatures in Costa Rica’s coral reefs. You’ll often spot them hiding in crevices or changing colors to blend with their surroundings.
Octopuses are a favorite among night divers, as they tend to be more active after dark. Conservation efforts help protect their reef habitats from overfishing and degradation.
Fun Fact: Octopuses have three hearts and blue blood!
Nudibranchs are small, brightly colored sea slugs that are often considered the jewels of the reef. Their incredible variety and vivid hues make them a favorite for macro photography.
While they might be tiny, they play a significant role in marine ecosystems by feeding on sponges, hydroids, and other invertebrates. Protecting coral in Costa Rica ensures a healthy environment for these delicate species.
Conservation Tip: Avoid touching or disturbing reef surfaces where nudibranchs live.
With its graceful wingspan and distinctive white spots, the spotted eagle ray is an awe-inspiring sight. You might see them gliding through open water or foraging in sandy seabeds around coral reefs.
These rays are sensitive to human disturbance, and like many marine animals, they are vulnerable to habitat loss. Scuba diving in Costa Rica offers a chance to see them up close — without harming their environment.
Size: Can reach up to 3 meters across!
Often misunderstood due to their fearsome appearance, moray eels are actually shy and non-aggressive. You can spot them peeking out from holes in the reef, their mouths opening and closing to help them breathe.
Morays play a vital role in the reef ecosystem by helping control fish populations. Keeping Costa Rica’s coral reefs healthy through marine conservation ensures a balanced food web that includes species like these.
Diving Tip: Use a flashlight on reef dives to spot them more easily.
White-tip reef sharks are a common sight on many dive sites across the Pacific coast of Costa Rica. They are generally calm and often seen resting on the seafloor during the day.
They are a top predator in reef systems and help maintain ecological balance. Protecting coral Costa Rica means preserving critical habitat for these sharks and their prey species.
Status: Near Threatened (IUCN Red List)
Parrotfish are colorful, coral-chewing herbivores that help reefs thrive by cleaning algae off the coral surface. Their “beak-like” mouths break down coral, which they excrete as fine sand — contributing to beach formation!
Marine conservation efforts in Costa Rica help regulate fishing practices to ensure healthy populations of parrotfish, vital for reef regeneration.
Eco Fact: One parrotfish can produce up to 100kg of sand per year!
These enchanting creatures are masters of camouflage, often clinging to coral branches or sea fans with their tails. Spotting a seahorse while scuba diving in Costa Rica is a rare and magical experience.
Unfortunately, seahorses are threatened by habitat destruction and the curio trade. That’s why marine conservation in Costa Rica includes habitat protection and public education.
Conservation Note: Never collect or handle seahorses — observe from a distance.
One of Costa Rica’s most iconic marine animals, the Pacific green sea turtle nests along many of the country’s beaches and feeds on seagrass and algae near coral reefs.
Scuba divers can often spot them resting in reef areas or gracefully swimming between coral heads. Marine conservation efforts are vital to protect their nesting beaches and feeding grounds.
Conservation Status: Endangered
Every one of these marine species — from the tiniest nudibranch to the majestic reef shark — depends on a balanced, thriving ocean ecosystem to survive. Costa Rica’s coral reefs are biodiversity hotspots, but they are under constant threat from climate change, pollution, and overfishing.
Our coral restoration program in Costa Rica is dedicated to reviving damaged reefs, planting resilient coral species, and educating the next generation of ocean stewards. When you support or volunteer with marine conservation projects, you directly contribute to the survival of these incredible creatures.
Whether you’re a scuba diver, marine biology student, or simply passionate about the ocean, you can help make a difference. Join our coral restoration projects or take a marine education course and be part of the solution.
Professional dive training equips you with the proficiency to navigate diverse marine environments confidently. As a PADI Divemaster, you’ll master buoyancy control, underwater navigation, and emergency response—skills crucial for conducting marine research and conservation activities effectively.
Holding a PADI Divemaster certification opens doors to various career paths in marine science, ecotourism, and environmental education. Whether leading dive tours, assisting in research expeditions, or working with conservation organizations, the possibilities are vast and impactful.
Beyond diving skills, the Divemaster program emphasizes environmental stewardship. You’ll learn about marine ecosystems, participate in conservation projects, and become an advocate for ocean health. This aligns perfectly with the goals of aspiring marine biologists committed to preserving marine biodiversity.
Becoming a Divemaster connects you with a worldwide community dedicated to ocean conservation. Engage in citizen science initiatives, collaborate on international projects, and share insights with fellow professionals passionate about marine ecosystems.
Programs like the ECO Divemaster course offered by Oceans Unlimited in Costa Rica provide immersive experiences in marine conservation. Participants engage in coral reef restoration, marine life surveys, and ecological monitoring, gaining practical skills that complement academic studies.y.
Embarking on professional dive training is more than an educational endeavor; it’s a commitment to ocean stewardship. For aspiring marine biologists and conservationists, the PADI Divemaster program offers the tools, experiences, and connections to make a tangible impact in marine science.
Ready to dive into a career that makes a difference? Explore the ECO Divemaster program by Oceans Unlimited and take the first step towards becoming a leader in marine conservation.
Melissa Richardson has completed week 4 of her 10 week internship as a diver with MCCR. Coming from Austin, Tx with a degree in illustration from SCAD, Melissa came to Quepos, Costa Rica starting at square one when it comes to diving. Since her arrival, she has already met so many people, learned a lot about diving and marine conservation, and has submurged herself completely in the pura vida lifestyle. Click on the link to read more about her experience so far!
Interviewed by Sarah Putnicki
With all of the projects we work hard on throughout the year, we are always looking for help. You can get involved with one of our internship or volunteer programs.