Underwater

Marine biologist reveals what’s underwater at Halaveli

Published

13 years ago

May 9, 2013

Here is third week’s instalment from marine biologist Robin Aiello sees her come face to face with the awe-inspiring whalesharks in the waters off Halaveli.

Whiptail Ray

It has been another amazing week full of beautiful dives, snorkels, lagoon cruises and island walks. The weather has been clear and warm, and the seas so calm that you can do an entire marine biology session from the surface without even getting wet.
I have, in fact, been spending hours on the jetty with guests looking down into the sea and spotting some fantastic animals. We have many harmless blacktip reef sharks that slowly cruise back and forth under the jetty, whiptail rays that look almost like eagles flying through the water, unicorn fish with their long horns sticking out from their foreheads, long slender coronet fish with their huge extended mouths, and bluefin trevallies (also called jacks) chasing schools of small silver fish.

Bluefin Trevallies

The trevallies (jacks) always put on an exciting show for us as they stalk and hunt the small silver fish that form massive schools in the very shallow water at the beach.

Small groups of 3 – 6 bluefin trevallies swim up and down the beach, getting closer and closer to the shore and forcing the small fish to form tighter and tighter schools – it is like cowboys rounding up the cattle on a range.

They do this for some time, then, without any warning, there is a huge commotion. The trevallies have decided it is time to strike, and change direction at full speed (which is really really fast) and dash through the school, grabbing fish as they go. The small silver fish, in response, take off in all directions like a firework display. They will even jump out of the water and land on the beach in their sheer panic to get away.

But, there is no where for the small fish to hide. Suddenly other predatory fish join the feeding frenzy, and if that is not bad enough, the seabirds and herons fly in from all directions to join the mayhem and pounce on any fish they can. The whole frenzied activity lasts only a few seconds, but what excitement! Sometimes I feel sorry for the poor little fish!

An unplanned evening snorkel

Probably the most unusual thing that I have seen in a long time was spotted one evening from the jetty. I was heading to dinner, all dressed up, and one of the guests asked me what it was – I had no idea – didn’t even know if it was manmade or natural.

So I ran back to my villa and grabbed my snorkeling gear and jumped into the water.

This thing was weird! At first, I had no idea what it was. It was in constant motion, rolling around and undulating, but I soon discovered it was the water movement that caused it to move – it was not actually alive. It was slimy and felt like thick mucous, and to add to the bafflement, there were thousands of little pink/purple balls embedded in it.

Finally it dawned on me that it had to be some sort of egg case – most likely molluscan from either a snail or a squid. After a couple of hours of research I discovered that it was, in fact, the egg case of a very large squid that reaches a size of over 1 metre called the Diamondback Squid. This squid would have laid the egg case out in the lagoon and the tides, currents and waves washed it into the shallows. Very interesting.

Diving with whalesharks

Yesterday, though, was the real highlight of my whole visit – every Sunday the Dive Center offers a day trip to find and snorkel with whalesharks. And what a day we had!

Thanks to our amazing boat crew, and of course the legendary snorkel guide Santana, we had the wonderful experience of swimming with 3 large whalesharks. Amazing! It is no easy feat to find a whaleshark – since they are fish, they do not come to the surface to breath like whales, so the only way to find them is to patrol an area – up and down along the coast. The crew stand lookouts on the roof of the boat looking for a large dark shadow in the water.

Then, if one is spotted, there is a flurry of activity as we get on our gear and jump overboard. At this point, the race begins. Although these huge animals are barely moving a fin at all, they maintain such a fast speed that we as mere human snorkellers must kick and kick and kick as fast as possible to keep up with them. They do not seem to be bothered by us at all – in fact, on several occasions they appeared to be curious and changed direction to come right up close underneath – within only a few metres of us.

When they are this close, they take your breath away. They really are special creatures!

They are so spectacular, that this creature will be the topic of my Creature Feature for this week.

Creature Feature – Whalesharks

Whalesharks are well known to frequent a spot on the southern part of the Ari Atoll – no one really knows why they ‘hangout’ in this area. But they seem to be mainly young-adult males that are about 6–8 metres in length.

Although this is considered relatively small for a whaleshark (they can reach sizes of over 12m) they are still incredibly impressive. In fact, whalesharks are the largest fish in the world.

Whalesharks are a type of shark – not a whale. They, like all sharks, have a cartilaginous skeleton rather than bone, have what are called denticles covering their skin instead of scales, do not have an air bladder, but use a liver full of oil for buoyancy, and of course they have ‘replaceable’ teeth rather than only one set like most reef fish. Sharks have hundreds of teeth and can go through as many as 30,000 teeth during their lifetime.

What happens is that teeth that form the ‘front-row’ periodically fall out, and within only a few days another tooth that behind in the ‘second-row’ will rotate into position. It is kind of like a conveyor belt of teeth. In this manner the shark always has fresh, sharp teeth! Whalesharks, although they do not use them, actually have about 300 very small teeth.

How whalesharks feed

So how does a whaleshark feed if it does not use teeth? Well, these giants of the sea, feed on some of the smallest animals in the ocean, plankton, by a method called filtering feeding.

Inside their mouths they have an unique system of filter-pads that trap all the small plankton – a lot like a sieve.

Whalesharks feed in two ways – ‘gulping’ and ‘ram feeding’. If there is plenty of concentrated plankton in the water, these sharks will stay in one place and take in huge gulps of water full of plankton.
If, however, the plankton is spread out in the water, then the sharks will swim at an average of 4km per hour with their mouths open – when they have enough food, they will swallow, then resume feeding – this is ‘ram-feeding’.

To watch them feed is incredible. They have huge mouths – up to 1.5 metres wide and they can filter over 300,000 litres of seawater per hour.

Identifying whalesharks by their spots

Other than the sheer immense size of these fish, the other really noticeable feature is the patterning. They are fully covered with spots and dots, and some lines – really beautiful.

They almost look like a bright starry night sky. In fact, a few years ago a couple of scientists came up with the interesting idea to use a computer program designed for tracking stars to document the spots on individual whalesharks.

Since the patterning on each whaleshark is unique for that individual (much like our human fingerprints are unique to each person), scientists have been able to compile a global database of whalesharks from photographs of their spots.

So, when you visit Halaveli Resort, be sure to take the trip out looking for whalesharks – it is fantastic!

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Four Seasons Resorts Maldives honoured for 25 years of marine conservation efforts at HICAP 2026

Published

1 week ago

October 14, 2026

m@ldives

Four Seasons Resorts Maldives has won the 2026 Sustainable Hotel Award for Biodiversity Action & Education from Hotel Investment Conference Asia Pacific (HICAP). The award recognises 25 years of conservation, research and training at Four Seasons Resort Maldives at Kuda Huraa (since May 1998) and Four Seasons Resort Maldives at Landaa Giraavaru (since November 2006).

Winners are selected by an expert judging panel for innovative sustainability practices that can be replicated across Asia Pacific. The Biodiversity Action & Education category emphasises measurable conservation and practical learning. Four Seasons Resorts Maldives was recognised for connecting sustained conservation and scientific advances with hands-on learning for guests, local schoolchildren and young Maldivians.

The resorts’ Reefscapers partnership, launched at Kuda Huraa in 2001, encompasses more than 9,000 coral frames across one of the Indian Ocean’s largest artificial reef restoration projects. Decades of monitoring have supported peer-reviewed, AI-assisted research into coral survival, informing restoration methods as environmental pressures increase. Corals on mature frames now reproduce naturally, while spawning and larval-settlement research advances methods to repopulate damaged reefs and increase diversity.

That research also supports practical conservation education. Since 2023, Landaa has hosted the Baa Atoll Marine Biology Internship Programme, a three-stage, three-year initiative introducing students across the atoll to marine science.

Furthermore, the resorts’ government-accredited Apprenticeship Programme has produced 1,058 Maldivian graduates since 2001 and currently offers 14 career pathways, including Marine Conservation. A new, fully funded four-year Marine and Environmental Science apprenticeship with Maldives National University combines academic study with fieldwork at both Kuda Huraa and Landaa Giraavaru. The pathway progresses towards a bachelor’s degree.

“This award belongs to the people who keep doing the work,” says Armando Kraenzlin, Regional Vice President and General Manager. “Our marine biologists, conservation partners, gardeners and trainers turn years of experience into knowledge others can use. Guests and young Maldivians contribute too, learning alongside our teams and helping carry that work forward.”

Science that informs action

Marine Savers, the resorts’ conservation programme, operates from Marine Discovery Centres at Kuda Huraa and Landaa Giraavaru, working with long-term partners including Reefscapers and The Manta Trust.

Reefscapers achieved a Maldives first by collecting coral reproductive cells in the wild, then fertilising them and settling larvae under controlled conditions. During severe bleaching in 2024, teams relocated 28,000 corals to deeper, cooler waters.

The Turtle Rehabilitation Centres at Kuda Huraa and Landaa Giraavaru have cared for over 500 sea turtles. To date, of the many injured by ghost fishing nets carried into Maldivian waters by wider Indian Ocean currents, more than 280 have been released.

Both resorts also support manta research, with studies by Landaa’s onsite Manta Trust scientists identifying the world’s largest-known reef manta population. Their research contributed to Baa Atoll’s designation as the Maldives’ first UNESCO World Biosphere Reserve in 2011.

Learning through participation

Guest coral sponsorship funds restoration, with guests transplanting fragments alongside marine biologists and following their development on MarineSavers.com.

Marine Discovery Centres connect guests and local schoolchildren with this conservation work. At Kuda Huraa, the Junior Marine Savers introduces younger children to ocean conservation through hands-on marine discovery activities. Landaa’s one-to-one Trainee Marine Biologist Programme gives teenagers practical experience across six specialist modules, while garden tours connect cultivation with food, wellness and composting.

All of the resorts’ research, field reports and findings are shared with the Maldives wider resort community, students, researchers and a global audience via MarineSavers.com. The Reefscapers programme’s selection as a World Sustainable Hospitality Alliance case study further extends its relevance to the hospitality industry.

For more information and ways to participate in award-winning biodiversity conservation and education at Four Seasons Resorts Maldives, visit MarineSavers.com or contact the Resorts at reservations.mal@fourseasons.com or call +960 66 00 888.

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Sun Siyam Iru Veli invites guests to explore Maldives’ underwater world

Published

2 weeks ago

October 9, 2026

m@ldives

Marine experiences at Sun Siyam Iru Veli begin just beyond the island’s shoreline, from its house reef in Dhaalu Atoll to the waters of Faafu, Meemu and South Ari Atolls. For guests, this geographical reach means the underwater journey can take many forms, from a first guided snorkel close to the island to more advanced diving and encounters farther across the atolls.

The Big Encounters

Among the most notable journeys beyond the waters of Iru Veli is the Whale Shark Excursion to the South Ari Marine Protected Area. The guided snorkelling experience takes guests in search of the world’s largest fish, with the chance to snorkel alongside them when conditions allow. The same waters also offer manta encounters, another remarkable way to venture farther afield and see these graceful ocean giants in their natural environment.

Across the Atolls

The journey continues across Meemu and Faafu Atolls, where full-day explorations move between open-water encounters, quieter lagoons, coral reefs and uninhabited islands. Around Makunueri, guests can snorkel vibrant reefs with the chance to encounter turtles, sharks, rays and a variety of reef life. For those seeking a more exclusive experience, private journeys offer a way to discover coral gardens and lesser-visited stretches of ocean, with some also providing a first introduction to scuba in calm waters.

The House Reef, in Daylight and After Hours

Closer to Iru Veli, the house reef tells a different story. By day, guided snorkelling invites guests to coral formations and resident marine life directly around the island. After sunset, the same waters take on an entirely different character as nocturnal species emerge. The guided night snorkelling offers the chance to encounter nurse sharks and experience the reef from a whole new perspective with the help of fluorescent and blue lights.

A Different Side of the Water

For those looking for something less conventional, the SSI Mermaid programme brings a playful side to underwater exploration. Guests can swap fins for a mermaid tail and learn the techniques needed to move comfortably and confidently through the water. Combined with underwater photography and video, this experience offers a chance to explore a more imaginative side of underwater exploration at Iru Veli.

A Lasting Impact

The marine discovery at Iru Veli also extends beyond observation. Through the resort’s coral planting initiative, guests can contribute to the continued restoration of the house reef and leave a lasting connection beneath the surface. Back on land, the weekly Marine Night brings these stories together, sharing more about marine life, reef conservation and underwater environments surrounding the island.

Beyond the many ways to explore the ocean from the surface, the SSI-certified dive centre at Iru Veli offers adventures for seasoned divers and complete beginners alike. Certified divers can continue exploring the surrounding dive sites with the resort’s professional team, while first-timers can start with an introductory scuba experience. Guests looking to go further can also earn SSI certification during their stay, turning their holiday into the start of a new diving journey.

From the house reef to some of the Maldives’ most remarkable marine encounters, Sun Siyam Iru Veli reveals an island experience shaped as much by what lies beneath the surface as by what surrounds it.

Discover more marine activities, explore the latest Sun Siyam Iru Veli offers.

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Machchafushi Maldives brings Nikon photographers to South Ari Marine Protected Area

Published

2 weeks ago

October 8, 2026

m@ldives

Machchafushi Island Resort & Spa Maldives, The Centara Collection, is set to host an exclusive underwater photography and media experience from 14 to 17 October 2026, in partnership with Youth Global Program in partnership with Nikon Middle East & Nikon India. The programme is supported by Lexar Middle East and Hollyland Middle East. Led by Nikon’s underwater photographers and welcoming select international media, the programme will offer an immersive exploration of Machchafushi’s exceptional marine environment and the underwater world of the South Ari Atoll.

Set within the South Ari Marine Protected Area (SAMPA), Machchafushi offers an exceptional setting for an exclusive underwater photography experience. The resort’s award-winning house reef, spanning more than five times the area of the island itself, creates an expansive underwater landscape shaped by vibrant coral gardens, diverse marine life, and a series of distinctive dive sites.

The experience will take Nikon underwater photographers and select media beneath the surface of Machchafushi, offering the opportunity to capture the island’s marine environment from a unique perspective. From coral formations and marine life to the deeper waters surrounding the island, the programme will showcase the diversity and character of the South Ari Atoll, including the renowned Kudhi Maa shipwreck, which rests between approximately 12 and 30 metres under the surface and has become an established artificial reef.

Together, Machchafushi’s award winning house reef, vibrant coral gardens, diverse marine life and Kudhi Maa create a compelling underwater canvas, offering visiting photographers and media an opportunity to experience and document a lesser seen perspective of the Maldives.

Beyond the reef, the programme will introduce participants to the wider Machchafushi experience, connecting the underwater environment with the island’s natural surroundings, dining, wellness and slower rhythm of island life. Together, these experiences offer a broader perspective of Machchafushi and its place within the South Ari Atoll.

The collaboration brings together Nikon’s expertise in photography and Machchafushi’s distinctive marine environment, creating an exclusive platform to showcase the underwater character of the South Ari Atoll through the lens of leading underwater photographers and international media, with support from Lexar Middle East and Hollyland Middle East.

Taking place from 14 to 17 October 2026, the experience will offer an opportunity to discover and document Machchafushi beyond the shoreline, from its award-winning house reef and vibrant marine life to the distinctive underwater landscapes surrounding the island. Through the photographers and media attending, the experience will bring a different perspective of the Maldives to audiences around the world.