Underwater
Marine biologist reveals what’s underwater at Halaveli
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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The Westin Maldives Miriandhoo Resort combines marine adventure with wellness-focused island stays
The Westin Maldives Miriandhoo Resort, a five-star holistic wellness sanctuary nestled in the pristine Baa Atoll UNESCO Biosphere Reserve, invites travellers to experience one of the Maldives’ most spectacular seasonal phenomena. From May through October, guests can witness the extraordinary feeding gatherings of manta rays that turn the waters of Hanifaru Bay into a world-renowned stage for marine life.
Just 45 minutes from the resort, Hanifaru Bay is among the planet’s most remarkable manta aggregation sites, famed for its “cyclone feeding” behaviour as mantas glide, spiral, and swoop through nutrient-rich waters in an awe-inspiring underwater ballet. With more than a thousand manta rays recorded in the bay, and the Maldives home to the world’s largest studied manta ray population, this protected sanctuary offers an unforgettable bucket-list opportunity to snorkel alongside these gentle giants.

“During peak season, it’s possible to witness dozens, sometimes over 100 manta rays, feeding in the bay, with occasional whale shark sightings, especially around the full moon,” shared José Daniel González, The Westin Maldives Miriandhoo Resort’s resident marine biologist.
Beyond Hanifaru Bay, the Baa Atoll Biosphere Reserve is celebrated for thriving reefs and abundant marine biodiversity. Divers and snorkelers can explore coral gardens filled with colourful reef fish, including batfish, fusiliers, and eagle rays, while dolphins are frequently spotted from the island. The resort also offers traditional line fishing and a wide range of watersports, from jet ski adventures to guided snorkelling experiences with turtles.

For guests who would like to learn more about the underwater world, The Westin Maldives Miriandhoo Resort hosts engaging marine education, including weekly marine biology presentations. Led by the resort’s resident marine biologist, these sessions highlight local ecosystems, marine conservation, and responsible tourism, helping guests connect more deeply with the island’s natural beauty.
After a day of exploration, guests can unwind with Westin’s signature wellness programs, from rejuvenating rituals at the overwater Heavenly Spa to energising movement at the WestinWORKOUT® Fitness Studio. Guests can also enhance post-adventure restoration with the WestinWORKOUT® Gear Lending Program, which includes the Recover and Recharge Kit by Hyperice, designed to ease muscle fatigue and help the body reset. Evenings promise restful comfort in one of the resort’s 69 spacious villas, complete with the award-winning Heavenly® Bed and curated Sleep Well amenities.

Those looking to visit the Maldives for this extraordinary season, or throughout the year, can benefit from the Escape to More package, which includes a complimentary upgrade to an All-Inclusive meal plan featuring three meals daily, unlimited beverages, and a restocked minibar, plus kids under 12 dine free.
For more information, please visit westin-maldives.com.
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Canareef Resort Maldives nominated among Indian Ocean’s leading dive resorts
Canareef Resort Maldives has been nominated for two categories at the prestigious World Travel Awards 2026: Indian Ocean’s Leading Dive Resort and Maldives’ Leading Dive Resort.
The nominations recognise Canareef’s exceptional position as one of the premier diving destinations in the region, offering unique underwater experiences found nowhere else in the Maldives.
Canareef Resort is home to the British Loyalty, the largest shipwreck in the Maldives. This 140-meter WWII oil tanker rests just minutes from the resort and has transformed into a thriving artificial reef, making it one of the most sought-after dive sites in the Indian Ocean.
Unlike other Maldivian atolls where manta sightings are seasonal, Addu is the only location where full- sized adult Oceanic Manta Rays with wingspans up to 5 meters can be seen year-round, regardless of monsoon season. These “mega-mantas” are a guaranteed highlight for divers visiting Canareef. The resort’s famous Shark Point, known as “The Shark Hotel,” features more than 20 Grey Reef Sharks resting together on the sandy bottom—a rare underwater phenomenon that attracts photographers from around the world.
As one of the few resorts located south of the Equator, Canareef offers the unique experience of diving in the Southern Hemisphere. Most significantly, while much of the region suffered from coral bleaching, Addu’s reefs remain among the healthiest and most vibrant in the Indian Ocean, displaying the pristine color and diversity that represents what coral reefs should look like.
The World Travel Awards, often called “the Oscars of the travel industry,” celebrate excellence across all sectors of tourism. The dual nominations position Canareef alongside the world’s top diving destinations and validate the resort’s commitment to marine conservation and exceptional guest experiences.
“These nominations reflect what our guests and the diving community have known for years,” says the Canareef management team. “Addu Atoll offers diving experiences that are truly unmatched, and we’re honored to share these underwater treasures with the world.”
The nominations also spotlight Addu Atoll and the southern Maldives, encouraging tourism diversification beyond the northern atolls. Canareef invites the diving community, past guests, and supporters to vote when World Travel Awards voting opens.
For those seeking world-class diving combined with unique marine encounters and pristine reef systems, Canareef Resort Maldives continues to set the standard for what a dive resort should be.
To support Canareef’s dual nominations and help showcase the unique marine biodiversity of Addu on the global stage, you can cast your vote here.
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Night snorkelling reveals hidden underwater world at Ellaidhoo Maldives by Cinnamon
There’s something quietly thrilling about stepping into the ocean after sunset. At Ellaidhoo Maldives by Cinnamon, when daylight fade and the reef slips into darkness, a completely different world begins to stir. What feels familiar by day transforms into something far more mysterious and far more alive.
Night snorkelling at Ellaidhoo Maldives by Cinnamon begins at around 6:30pm, when guests gather with the experienced team from Dive & Sail Maldives. Equipped with underwater torches, snorkellers ease into the slighly cooler waters surrounding the island, where every beam of light reveals a new discovery hidden within the reef.
What makes night snorkelling so fascinating is the dramatic shift in marine behaviour after sunset. Species that remain tucked away during the day begin to emerge from coral crevices and sandy seabeds. Moray eels weave through the reef in search of prey, octopuses glide silently across the ocean floor, and crustaceans slowly crawl out from their hiding places.
One guest described one of the most unforgettable moments of the experience as watching a group of reef sharks glide past in near-perfect formation. According to the guest, the sudden appearance of six to eight sharks emerging from the darkness was initially startling, but the feeling quickly shifted to awe as they moved calmly and effortlessly through the water, illuminated only by torchlight. The encounter, they shared, felt both thrilling and surreal in the stillness of the night reef.

Beyond the larger marine life, the reef reveals countless smaller details at night that are often missed during daytime snorkelling. Brightly coloured reef crabs, lobster-like crustaceans believed to be spiny lobsters, sleeping parrotfish hidden within the coral, and lionfish hovering near the reef edge all become part of the experience.
The corals themselves also appear remarkably different after dark. Under torchlight, sections of the reef glow with deeper shades of orange, gold, and crimson, while certain soft corals and coral polyps extend outward to feed in the currents.
The house reef at Ellaidhoo Maldives by Cinnamon is widely regarded as one of the Maldives’ most vibrant reefs, celebrated for its rich biodiversity and easy accessibility from the shoreline. Guests planning their next island escape can also take advantage of the resort’s ongoing summer offer, which includes complimentary roundtrip speedboat transfers for stays of seven nights or more along with added benefits through Cinnamon DISCOVERY, the loyalty programme by Cinnamon Hotels & Resorts.
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