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!
Action
OBLU NATURE Helengeli guests witness rare Ornate Eagle Ray

The Maldives is renowned for its surprises and in what can only be called a one-in-a-lifetime experience, on the 30th July a couple of lucky guests out snorkelling at OBLU NATURE Helengeli were treated to a cameo appearance of one of the most elusive sea creatures known. Whilst out taking in the wonders of Helengeli islands vibrant house reef, an Ornate Eagle Ray appeared, one of only a handful reported annually around the world.
The Ornate Eagle Ray, often dubbed the “unicorn of the sea”, is one of the rarest ray species known to humans, with fewer than 60 confirmed sightings globally to date. Despite a wide range of habitat from Indian Ocean to West Pacific, confirmed encounters remain extremely scarce according to sources including BBC Wildlife, Marine Megafauna Foundation and Oceanographic Magazine. The population is under surveillance by the ‘International Union for Conservation of Nature’ (IUCN), and this particular species of ray has an existence status of ‘Critically Endangered’, with population declines observed in conservation reports claims IUCN.
Explaining the uniqueness of this special sighting and of OBLU NATURE Helengeli’s location, TGI Maldives dive centre Operations Manager Greta Marcelli commented, “The guest sighting, made while snorkelling just metres from shore, adds to the limited tally of known observations in Maldivian waters, marking an extraordinary occurrence for both the guest and marine conservation alike.
“Sighting such a rare creature like the Ornate Eagle Ray is truly a remarkable experience to witness and one highly unlikely to ever repeat. That said, interestingly in 2025 at our sister islands of OBLU SELECT Sangeli and OBLU XPERIENCE Ailafushi also both in North Male’ Atoll, sightings had been made earlier this year in January. A staff member had spotted this ray species in the main boat lagoon at Sangeli island, and a guest posted a picture of one whilst on Ailafushi island – possibly completely unaware of just how rare these creatures are.”
This sighting underscores the importance of reef systems like Helengeli’s in offering refuge for rare species, even critically endangered ones such as the Ornate Eagle Ray. While rays are protected under Maldivian law since 2014, specific species-level monitoring remains limited.
Marine Boiologist Georgia Maggioni adds, “As resident marine biologists here in the Maldives, we are thrilled by these reports of rare sightings, it speaks volumes about the health and productivity of our island resorts reefs ecosystems. Although sightings of this species are exceptionally rare, its presence here signals encouraging progress in our conservation efforts, as we continue to support coral reef restoration around our resorts in both shallow lagoons and deeper waters”.
According to the IUCN that monitors the natural world and publishes ‘Nature’s Red List of Threatened Species’, latest research reports have been highlighting concerns for the Ornate Eagle Ray. In 2023, the last IUCN report published stated that ‘despite extensive baited remote underwater video surveying sharks and rays across 391 coral reefs in 67 nations and territories between 2009 and 2019, the Ornate Eagle Ray was only recorded three times, two off the Western Australia and one in Palau’.
Remaining as one of the ocean’s most mysterious species, very little is known about the ray’s migration patterns due to its rarity. However, scattered sightings across the Indo-Pacific, from the Maldives and Seychelles to Australia and the Philippines, suggest that this elusive ray may undertake wide-ranging movements through tropical reef systems. Its preference for shallow coastal waters, sandy bottoms, and coral-rich environments indicates possible seasonal migrations linked to breeding or feeding.
Greta concludes, “Due to its critically endangered status and the scarcity of confirmed data, each new sighting of a creature like the Ornate Eagle Ray plays a vital role in helping better understand the species’ range and behaviour. We are very lucky to have our guests document this encounter and capture the colours and importantly back print of the ray as this pattern is a unique identifier we share with our marine biology colleagues to better analyse migration and population.”
Excursions
OBLU NATURE Helengeli by SENTIDO hosts Dive Month for female journalists

PADI Women’s Dive Day, observed globally on 19th July, serves as an invitation for more women to engage with the underwater world, gain new skills, and become stewards of the ocean. At OBLU NATURE Helengeli by SENTIDO, this vision was extended into a month-long celebration, welcoming solo travellers, adventurous women, and families to take part.
As part of its inaugural International Women’s Dive Month, the resort hosted seven international female journalists for three days of scuba diving, storytelling, and shared experiences. The initiative was held in collaboration with dive centre TGI Maldives and ELE|NA Ayur Spa, a leader in wellness within the Maldives.
Alain Trefois, General Manager at OBLU NATURE Helengeli by SENTIDO, noted the significance of the occasion, stating that the belief in diving being accessible to all was brought vividly to life. He described the gathering of journalists from London to Almaty as a powerful meeting of East and West, united by encouragement and camaraderie both above and beneath the waves—an atmosphere the resort strives to cultivate.
Set against the backdrop of a vibrant house reef just steps from the shore and world-renowned dive sites nearby, Helengeli provides an ideal environment for both novice and experienced divers. For many of the visiting journalists, it marked their first time experiencing life beneath the surface—and it was only the beginning. Through a thoughtfully curated programme blending scuba diving with ocean-inspired wellness treatments, rejuvenating spa rituals, and insightful marine conservation talks, the resort created an immersive and holistic journey that left a lasting impression.
The heartfelt hospitality, expertise, and dedication of the resort’s operations team played a central role in the experience, ensuring that every element ran seamlessly and with sincere warmth.
Joining the journalists on their dives was Greta Marcelli, Operations Manager at TGI Maldives, who reflected on the joy of witnessing first-time divers. She described diving with such a diverse and pioneering group of women as profoundly inspiring and shared that Women’s Dive Month was introduced not only to celebrate women in diving but to foster connection, confidence, and a sense of community.
The media group, comprised entirely of women, brought together voices from across Europe and Central Asia. Among them were Ms. Dorothee Elisabeth Pfaffel of Augsburger Allgemeine and Allgäuer Zeitung (Germany), Ms. Camilla Rocca of Forbes and StyleCorriere (Italy), Ms. Irina Buchnaya of STEPPE (Kazakhstan), Ms. Míra Németi of Marie Claire (Hungary), Ms. Ivana Bednářová of Prestige Magazine (Czech Republic), Ms. Tamara Rybicka of Zwierciadlo (Poland), and UK-based freelance journalist Ms. Monica Daisy Meade. Their varied backgrounds in luxury, lifestyle, travel, and culture journalism brought a rich and global perspective to the occasion.
As the final dives came to a close, it was clear that the gathering had evolved beyond a press trip. It became a movement, a meaningful moment, and a memory in motion—one that each journalist will carry forward, with salt in their hair, stories in their hearts, and a lasting connection to the sea.
Excursions
Baros Maldives hosts special events in honour of PADI Women’s Dive Day

Baros Maldives participated in the global celebration of PADI Women’s Dive Day 2025, commemorating the occasion with a week of thoughtfully curated experiences that honoured the strength, curiosity, and connection shared among women divers. Held from 15th to 19th July, the initiative was designed to inspire confidence and camaraderie beneath the waves.
In the days leading up to the main event, female guests were treated to a 25% discount on their first or single dive. This included refresher and orientation dives along the renowned Baros House Reef, as well as Discover Scuba Diving sessions for those embarking on their first underwater adventure. These exclusive offers created an inviting and supportive environment, encouraging women of all experience levels to engage with Baros’ vibrant marine life.
The week culminated on 19th July with a complimentary dive led by the resort’s female dive instructors. Open to all certified women divers and those who had completed a Discover Scuba Diving experience during the week, the event brought together a spirited group of ocean enthusiasts for a memorable morning beneath the surface. The dive was marked by commemorative underwater photographs taken beside the official PADI Women’s Dive Day banner.
Ambra Dugaria, Dive Base Leader at Divers Baros Maldives, shared her reflections on the occasion: “At Baros, diving is about connection — to nature, to oneself, and to each other. PADI Women’s Dive Day is a powerful reminder that the ocean belongs to everyone. We are proud to provide a space where women feel empowered, celebrated, and free to explore.”
Led by Divers Baros Maldives, the initiative underscores the resort’s continued commitment to inclusivity, empowerment, and community within the diving world. As a PADI Five Star Gold Palm Dive Centre, Baros remains dedicated to delivering safe, immersive, and inspiring underwater experiences for divers of all levels.
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