Gladden Spit and Silk Cayes Marine Reserve Diving and Snorkelling Guide

Everything you need to know about visiting Gladden Spit and Silk Cayes Marine Reserve – our Splash Dive Center review.

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Many travellers to Belize don’t make it as far south as Placencia, a paradisical peninsula and laidback vacation hotspot known for its sandy beaches. Those who make the effort to book onto a boat trip here will know that a wealth of stunning remote cayes (islands) sit just offshore, offering vibrant coral reefs and a wealth of marine life.

Perhaps the most stunning area of all is Gladden Spit and Silk Cayes Marine Reserve, one of the most beautiful natural areas in Belize. A protected marine area, this part of the Belize Barrier Reef is home to a natural phenomenon of spawning fish, which attracts seasonal whale sharks. We spent a wonderful day diving Gladden Spit and Silk Cayes Marine Reserve with Splash Dive Center for Dan’s birthday, and have included everything you need to know about visiting, as well as our honest review of our experience, in this post.

About Gladden Spit and Silk Cayes Marine Reserve

Gladden Spit and Silk Cayes Marine Reserve is a marine protected area off the coast of Belize. The reserve is known for its rich marine biodiversity, vibrant coral reefs, and seasonal whale sharks.

Spanning around 25,980 acres, Gladden Spit and Silk Cayes Marine Reserve is home to unique underwater formations, including Gladden Spit, and three uninhabited islands, the Silk Cayes.

The reserve is one of the most popular places for SCUBA diving in Belize. Having spent our whole trip diving and snorkelling our way down the Belize Barrier Reef, from San Pedro and Caye Caulker to Placencia, we can attest to the pristine condition and wealth of marine life here. Gladden Spit and Silk Cayes Marine Reserve is one of the most impressive sections of the Belize Barrier Reef and shouldn’t be missed by any ocean lover.

Gladden Spit

Gladden Spit is an underwater promontory off an almost 90-degree sharp bend in the reef structure. This unique feature has a short, sloping shelf that falls off into the deep blue, about 40 to 2,000 metres (130 to 6,600 ft) deep.

This deeper area provides the perfect conditions for spawning fish, which in turn attracts a wealth of larger pelagic species, including whale sharks.

Silk Cayes

The Silk Cayes (sometimes called the Queen Cayes) are a set of three tiny islands (cayes) surrounded by a reef (called an atoll), which makes them perfect for snorkelling and shallow diving. The islands, which are some of Belize’s most beautiful cayes, are aptly named North Silk, Middle Silk, and South Silk. The Silk Cayes are famous for their pristine sandy beaches and shallow water, while the reef here is home to a variety of colourful corals and diverse marine life. The islands are one of only three atolls found outside the Pacific Ocean.

Gladden Spit and Silk Cayes Marine Reserve History

Gladden Spit and Silk Cayes Marine Reserve was established in May 2000 after lobbying from a local community organisation, The Friends of Nature (FoN).

In 1993, the group became concerned about the long-term impacts on Laughing Bird Caye, a small island about 12 miles (19 km) off the coast. Volunteers banded together to spread awareness, and in 1996, Laughing Bird Caye was declared a national park.

The group then turned their attention to Gladden Spit and the Silk Cayes. After successfully arguing for the protection of Gladden Spit, its spawning aggregation site, the congregating whale sharks, and the tourism value of the area, legislation for the Marine Protected Area was passed in 2003.

Later, the Friends of Nature merged with another conservation group, the Toledo Organisation for Sustainable Tourism and Empowerment, forming the Southern Environmental Association. Today, this group co-manages the Gladden Spit and Silk Cayes Marine Reserve, as well as Sapodilla Cayes Marine Reserve and Laughing Bird Caye National Park, with the Belizean government.

Where is the Gladden Spit and Silk Cayes Marine Reserve?

Gladden Spit and Silk Cayes Marine Reserve is situated around 22 miles (36 km) east of the main coast of Belize. The nearest hub is the Village of Placencia, which is located on a long peninsula.

Gladden Spit and Silk Cayes Marine Reserve is located within the Southern Belize Reef Complex, a UNESCO World Heritage site. This complex is a smaller part of the huge Mesoamerican Barrier Reef System. Stretching almost 700 miles (1,125 km), from Isla Contoy in Mexico to the northeast corner of Nicaragua, the Mesoamerican Barrier Reef is the second-longest barrier reef in the world and the largest in the Western Hemisphere.

South Water Caye Marine Reserve and Glover’s Reef Marine Reserve sit to the north, and Laughing Bird Caye National Park sits to the southwest.

Gladden Spit and Silk Cayes Map

We’ve pinned the location of Gladden Spit and Silk Cayes on our interactive map below.

The best things to do in the Gladden Spit and Silk Cayes Marine Reserve

Gladden Spit and Silk Cayes Marine Reserve is a natural paradise, and the best activities here take advantage of the islands, the underwater world, and simply soaking up the tranquil atmosphere. Some of the top things to do in the Gladden Spit and Silk Cayes Marine Reserve include:

Snorkelling in Gladden Spit and Silk Cayes Marine Reserve

Clear, shallow waters make Gladden Spit and Silk Cayes Marine Reserve the ideal place for snorkelling in Belize. Whether you’re a newbie or an experienced snorkeller, you’ll be treated to a wealth of marine life and may even see sea turtles, nurse sharks, eagle rays, lobsters, and reef fish, as well as colourful corals.

Snorkelling at Silk Cayes is fun for the whole family. The Silk Cayes islands offer shallow coral reefs, which are easy to access from the shore with calm conditions and little current. Snorkelling at Gladden Spit requires jumping in from a boat where deeper waters harbour larger marine life – if you’re visiting in season, you may even spot a whale shark.

Diving in Gladden Spit and Silk Cayes Marine Reserve

Belize is one of the few locations in the world where you can SCUBA dive with whale sharks. While it’s unusual to see them on a dive, it’s always possible. More likely, you’ll see a variety of corals, sea fans, sponges, fish like groupers, barracudas, and reef fish, sea turtles, eagle and stingrays, and nurse sharks.

Gladden Spit and Silk Cayes Marine Reserve Dive Sites

There are several amazing dive sites to choose from, but which one you visit will likely depend on the day, the water and weather conditions, and will be decided by your captain and dive instructor. Here are some of the top dive sites in the Gladden Spit and Silk Cayes Marine Reserve.

North Wall

One of the premier dive sites in the area, North Wall is teeming with black groupers, hawksbill turtles, spotted eagle rays, green and spotted moray eels, and schools of horse-eye jack and schoolmasters. Occasionally, reef sharks, manta rays, and even whale sharks are spotted here, too. This dive is usually done as a multi-level dive starting at 24 metres (80 ft) off the wall and then approaching about 12 metres (40 ft) on top of the reef crest.

White Hole

White Hole was our favourite dive site in the Gladden Spit and Silk Cayes Marine Reserve. You descend onto a sandy floor at around 10 metres (30 ft) (hence the name of the site) before passing colourful coral formations and vibrant reefs where stingrays, moray eels, and nurse sharks are usually found. The terrain slopes gently to the outer wall of corals to about 21 metres (70 ft), then drops steeply into the blue, where spotted eagle rays can sometimes be seen.

Traditionally, a fishing spot for local fishermen and a prior lionfish hunting ground, this site is home to a lot of marine life. We were immediately met by around 4 to 6 nurse sharks who then accompanied us on our entire dive! It felt a bit like when you pick up stray dogs on a walk, except they were sharks. This behaviour stems from when divers used to hunt invasive lionfish on the reef, leaving their catch in the water, which the nurse sharks soon came to realise was an easy meal. The sharks now accompany divers in the hopes they might spear them a lionfish – our little pack even flushed a lionfish out of its hiding place for us. While it’s not the most natural behaviour for sharks to associate humans with food, it’s a harmless one now that divers have to take any speared lionfish back to the surface with them, where the meat is sold to restaurants and other parts are repurposed by local businesses in crafts like jewellery making.

Turtle Canyons

Just north of North Wall, Turtle Canyons is aptly named as it slopes down to about 18 metres (60 ft). This site offers a perfect resting place for hawksbill and loggerhead turtles, which are frequently seen here. This is also a good spot for micro-photographers wanting to capture smaller juvenile species, including spotted drums, cleaner shrimps and arrow crabs. Recently, a number of lionfish have been spotted in this area, probably attracted by the juvenile species. The entire dive is done in and around the canyons in the 15 to 18 metres (50 to 60 ft) depth range.

Gladden Spit

The quintessential dive site, Gladden Spit, is one of the top places in the world to dive with whale sharks. While sightings can’t be guaranteed, you’ll likely also see a variety of marine life, including schools of snapper, jacks, grouper, barracuda, and reef sharks on a dive up to depths of 18 to 40 metres (60 to 130 ft).

Wildlife in Gladden Spit and Silk Cayes Marine Reserve

A real highlight of visiting Gladden Spit and Silk Cayes Marine Reserve is the variety of marine animals you might see.

Fish

Gladden Spit and Silk Cayes Marine Reserve serve as an important spawning site for over 30 species of reef fish. Among the most notable species found here are Cubera snappers and Dog snappers, which gather in large numbers to breed. This reserve is recognised as the largest known aggregation breeding site in the Caribbean, making it a crucial habitat for sustaining fish populations in the region.

Whale sharks

Whale sharks visit Gladden Spit and Silk Cayes Marine Reserve seasonally. Every year between March and June, they congregate in the waters off Placencia and feed on the fish spawn produced by thousands of mating fish in Gladden Spit. They are most commonly spotted from two days before the full moon until ten days after.

Sharks

Gladden Spit is home to a variety of shark species, including the Caribbean reef shark, blue shark, great hammerhead, scalloped hammerhead, bull shark, and nurse shark. These species thrive in the rich waters of the reserve, benefiting from the protected marine environment.

Sea turtles

The reserve also provides an essential habitat for sea turtles, including green turtles, hawksbill turtles, Kemp’s Ridley turtles, and loggerhead turtles. These species rely on the reserve’s coral reefs and seagrass beds for food and nesting grounds.

Rays

Several kinds of rays can be found in the waters around Gladden Spit and Silk Cayes. Commonly spotted species include spotted eagle rays, yellow stingrays, southern stingrays, and roughtail stingrays. Manta rays may also occasionally be spotted. These graceful creatures are often seen gliding through the clear waters of the reserve.

Coral

The reserve is home to critically endangered coral species, including staghorn and elkhorn corals, which are vital to reef health and marine biodiversity. Other important coral species found here include Lamark’s sheet coral, elliptical star coral, star coral, fire coral, montastraea corals, and rough cactus coral. These corals provide shelter and food for many marine organisms, making them an integral part of the ecosystem.

Birds

The skies above Gladden Spit and Silk Cayes Marine Reserve are filled with frigatebirds, pelicans, and other seabirds that rely on the rich marine environment for food. Additionally, a colony of terns has been recorded nesting on North Silk Caye, further emphasising the area’s importance as a wildlife sanctuary.

Swimming with whale sharks in Gladden Spit and Silk Cayes Marine Reserve

Where once whale sharks used to be quite prominent in Gladden Spit, sightings have unfortunately been declining year-on-year. They are an endangered species, and there has been such little activity in the area that whale shark tours in Belize barely run anymore. This is a problem seen throughout the Caribbean, from Mexico to Utila, a Honduran island that also once used to have frequent whale shark visitors and now receives the odd, out-of-season whale shark, if any.

However, there’s always a chance you may still see a whale shark in season.

You may see a whale shark pass by on a dive, but the best way to encounter one is to snorkel. When observed from a distance, whale sharks are content to feed at the surface, and you’ll get a better view than if you were to pursue them.

There are strict rules for swimming with whale sharks in Belize to ensure that the encounter is ethical.

No flash photography, touching, riding, chasing, or harassing of any kind is allowed. While it may be tempting to reach out your hand and touch the whale shark, it can be harmful, transfer bacteria, and remove the slimy coating that protects their skin from parasites and infections. Touching a whale shark comes with a $10,000 BZD fine.

How to get to Gladden Spit and Silk Cayes Marine Reserve

Gladden Spit and Silk Cayes Marine Reserve is only accessible via boat, and the best way to get there is to book onto a snorkel or diving tour.

Almost all boat tours leave from Placencia, the nearest mainland hub, about 22 miles (36 km) away. The journey takes around 45 to 60 minutes and gives you the chance to see some of the stunning Belizean coastline. It’s not usually very bumpy as it’s within the barrier reef, but conditions will depend on the weather, and it’s worth taking seasickness tablets if you’re prone to illness.

From Belize City, you can take a 30-minute domestic flight to Placencia with Tropic Air (who we flew over the Blue Hole with) or Maya Island Air, then join a boat tour from there. Alternatively, a 3-hour shuttle or driving in a rental car to Placencia is also an option.

Some tour operators also offer trips from Hopkins (a 1.5-hour journey by boat) and Dangriga (a 2-hour journey by boat), but these are less frequent and the journey time is longer.

Where to stay to visit Gladden Spit and Silk Cayes Marine Reserve

There are no accommodation options within the marine reserve, so planning your Belize trip takes a bit of thought. Instead, most travellers stay in hotels in Placencia, a nearby village on the mainland. We enjoyed a perfect few days at the Royal Rat Hostel for Dan’s birthday, which we also spent diving in the Gladden Spit and Silk Cayes Marine Reserve.

If you’re travelling with your own boat, there are a limited number of moorings for overnight sail charters at Silk Cayes.

There are some wonderful accommodation options near Gladden Spit and Silk Cayes Marine Reserve. We have included our favourites below:

When to visit Gladden Spit and Silk Cayes Marine Reserve

The best time to visit Gladden Spit and Silk Cayes Marine Reserve is in the dry season, from around February to May. However, snorkelling and diving in Gladden Spit and Silk Cayes Marine Reserve is generally good all year round.

It’s worth timing your visit with whale shark season, which falls between March and June. The best chance of sightings occurs in the peak of the spawning season in May and June, around the full moon, two days before and up to ten days after. Whale shark sightings are very rare nowadays, unfortunately, due to a dwindling population, so you’ll still need luck on your side to see one, even in season.

The wet season runs from June to December. While this doesn’t mean constant rain, more frequent showers do occur. Hurricanes are possible, although rare, between August and October.

Our experience in Gladden Spit and Silk Cayes Marine Reserve

We had an amazing time diving in Gladden Spit and Silk Cayes Marine Reserve for Dan’s birthday, and it was one of our favourite things to do in Placencia. We booked a two-tank dive with Splash Dive Center, which included lunch on one of the Silk Cayes. It was by far one of the best dive days we did and one of the best things we did, not just in Placencia, but throughout our whole time in Belize.

Splash Dive Center Review

Our day started at the Splash Dive shop in Placencia, where we checked in, filled in the necessary paperwork, got kitted out, and enjoyed juice and biscuits by the lagoon.

The journey out to the Gladden Spit and Silk Cayes Marine Reserve was a smooth and scenic one, with views of mangroves morphing into blue ocean and paradise islands.

We were the only divers with our guide, so it was a private experience, which really fosters a better sense of connection and safety.

The boat was spacious and comfortable with plenty of cold drinking water, and we were even provided with towels.

On arrival to the island at Silk Caye, we were given a briefing by rangers on how to respect the reef and the rules of the marine park.

On dive 1, we saw so many colourful corals, lots of lobster and lionfish, a crab, a huge grouper, a pufferfish, a moray eel, a spotted eel, and then a couple of nurse sharks came out to say hi.

We had lunch on the island during our surface interval – traditional Belizean food, including rice and beans, potato salad, and watermelon with juice – delicious.

Dive 2 was simply breathtaking. We were accompanied on our 45-minute dive by 4 to 6 gentle nurse sharks the whole time! It felt like walking dogs as they were so companionable. Watching them weave around us, gliding over the reef, was magical.

After the second dive, we got to experience a bonus snorkel excursion. We stopped by a local fisherman who was cleaning his catch. The scraps were dropped into the water (standard practice throughout Belize) and attracted a number of stingrays, a spotted eagle ray, and a loggerhead turtle. It’s a fascinating phenomenon to see first-hand the relationship between fishermen and marine animals in Belize.

Overall, the day was a truly excellent experience. The professionalism, level of service, and fun attitude of the crew were fantastic, the diving in Gladden Spit and Silk Cayes Marine Reserve was simply stunning, and it was the best way we could have wished to spend Dan’s birthday. If you’re looking for a dive shop in Placencia or considering diving or snorkelling Gladden Spit and Silk Cayes Marine Reserve, we’d highly recommend you choose to book with Splash Dive Center.

About Splash Dive Center

Splash Dive Center is a Placencia-based dive company that is committed to providing guests with memorable, eco-friendly experiences in Belize. They don’t just offer epic ocean-based experiences, from snorkelling to diving, but also a range of inland adventures which foster a deep connection to the environment and community. Some of the places in Belize you can visit on a tour with Splash Dive Center, besides Gladden Spit and the Silk Cayes, include the Great Blue Hole, Laughing Bird Caye, Glover’s Reef, and South Water Caye, as well as Cockscomb Basin, the ATM Cave, Monkey River, the Inland Blue Hole, and Mayan Ruins like Xunantunich.

Having had a truly terrible experience diving in Caye Caulker, where the company took us out in a storm with leaky equipment, and the conditions were so bad we refused to do the second dive, professionalism and safety are really important to us. Splash Dive Center are an award-winning PADI Five Star Instructor Development Center, and we found all their gear to be top-quality. We felt really safe in the care of our diving guide and captain, and really felt like our safety was a priority.

We also really appreciate Splash Dive Center’s commitment to environmental conservation and hands-off policy. They have a code of conduct, which details their no-touch and no-feeding policies, as well as best practices for minimising your impact through good buoyancy and fin control. Having seen a fair amount of unsustainable tourism in Belize, from companies feeding sharks in Sting Ray Alley to other divers touching marine life on our dive in Caye Caulker, it’s not only refreshing to find a company that prioritises environmentally-friendly tourism, but it’s also imperative to ensuring tourism in the region is sustainable. The most impact you as a traveller can have is by choosing to put your money behind companies that have these policies, proving there’s less demand for unethical practices and motivating change.

In the low season, when Splash Dive Center’s guides aren’t booked every day, they turn their hands to hunting invasive lionfish, which are causing mass destruction to Belize’s reef. The meat is used in local restaurants, while local businesses use the excess in industries like jewellery-making.

It’s also really great to see that Splash Dive Center takes part in initiatives to support the local community. They have a community support program, where they teach local children to dive for free, helping to ensure roles in the tourism and oceanic research sectors are accessible to locals. They also support a running club, which is supported by their not-for-profit organisation, Arrecife Handmade.

Is Gladden Spit and Silk Cayes Marine Reserve worth it?

Yes, Gladden Spit and Silk Cayes Marine Reserve is 100% worth a visit! Whether you’re a keen diver, newbie snorkeller, or simply want to relax on a stunning paradise island, you can’t go wrong with a trip to the Silk Cayes. Gladden Spit offers some incredible sections of reef with the chance to see the rare whale shark. You also have a high chance of seeing sharks, rays, and turtles, as well as a wealth of fish, corals, and other marine creatures. We’d highly recommend adding a trip to Gladden Spit and Silk Cayes Marine Reserve to your Belize itinerary!

What to pack for a trip to Gladden Spit and Silk Cayes Marine Reserve

Splash Dive Center will provide you with all the gear you need for a tour to Gladden Spit and Silk Cayes Marine Reserve, from snorkel and dive equipment to a towel, lunch, and water. But here are a few things you won’t want to forget:

Gladden Spit and Silk Cayes Marine Reserve FAQs

We hope this post has been useful for learning about Gladden Spit and Silk Cayes Marine Reserve. We’ve answered some frequently asked questions below to help you plan your trip.

What is Gladden Spit in Belize?

Gladden Spit is an underwater promontory located within a marine reserve off the coast of Placencia, Belize, that is a popular dive site. It is part of the Gladden Spit and Silk Cayes Marine Reserve (GSSCMR). This is a protected area within the Belize Barrier Reef System, covering approximately 25,980 acres (10,510 hectares) of ocean, coral reefs, and marine ecosystems. The Gladden Spit dive site is most famous for its seasonal whale shark aggregations and diverse marine life.

Why do people visit Gladden Spit in Belize?

People visit Gladden Spit in Belize for its incredible marine biodiversity, world-class diving, and the chance to swim with whale sharks. Between March and June, this area used to be one of the best places in the world to encounter whale sharks, which gathered to feed on spawning snapper. Now, sightings are much less frequent. The reserve also offers stunning coral reefs, home to sea turtles, rays, reef sharks, and colourful fish, making it a top destination for both snorkellers and divers. Visitors can explore the nearby Silk Cayes, small, pristine islands with white sandy beaches and crystal-clear waters. In addition to marine adventures, the area plays a crucial role in sustainable fishing and conservation, with efforts in place to protect its rich ecosystem.

How long is the boat ride from Placencia to Silk Caye?

The boat ride from Placencia to Silk Caye takes approximately 45 minutes to 1 hour, depending on sea conditions. Most tours to Gladden Spit and Silk Cayes Marine Reserve depart from Placencia in the morning and return in the afternoon.

Are there whale sharks in Placencia, Belize?

Yes (if you are very lucky)! Whale sharks visit the waters near Placencia, specifically at Gladden Spit, between March and June. This is the only place in Belize where both divers and snorkellers can encounter these gentle giants. They are attracted by the spawning of fish, which occurs around the full moon each month. Unfortunately, due to many reasons, including human intervention, climate change, and a dwindling population, sightings are now very rare where once they were frequent. However, there’s still a chance you’ll get lucky and see one in season.

Read next:

The Ultimate Guide to SCUBA Diving in Belize

A Traveller’s Guide to Placencia

24 Best Things to Do in Placencia

How to Visit Cockscomb Basin Wildlife Sanctuary

Our Royal Rat Hostel Placencia Review

Hopkins vs Placencia: Battle of the Beach Towns

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