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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InterContinental Maldives Maamunagau Resort launches ‘Swim with Nurse Sharks’ experience

Published

5 days ago

February 9, 2026

m@ldives

Nestled in the pristine waters of the Raa Atoll, InterContinental Maldives Maamunagau Resort introduces Swim with Nurse Sharks, a new guided marine experience offering guests a rare opportunity to encounter these gentle creatures in their natural lagoon habitat.

Located just minutes from the island, the calm, shallow waters provide ideal conditions for observing nurse sharks at rest and in motion. The one-hour experience operates three times a week by speedboat and is designed for small groups, making it suitable for families and confident swimmers seeking a meaningful connection with the ocean.

Guided with care and respect for the environment, the experience reflects the resort’s ongoing commitment to marine awareness and responsible interaction with wildlife. Guests gain insight into the behaviour of nurse sharks while exploring one of the region’s few accessible snorkelling sites dedicated to this species.

Available at USD 95++ per person, with special rates for children under 12, Swim with Nurse Sharks adds a distinctive new chapter to the resort’s immersive ocean experiences.

For more information on “Swim with Nurse Sharks” at InterContinental Maldives Maamunagau Resort, please visit the resort’s website.

Excursions

Manta season experience returns as InterContinental Maldives Maamunagau announces 2026 retreat

Published

2 weeks ago

February 2, 2026

m@ldives

InterContinental Maldives Maamunagau Resort has announced the dates for its 2026 Manta Retreat, following the programme’s strong reception in recent years. The retreat will take place from 24 to 27 March 2026, coinciding with the Maamunagau manta season, when juvenile manta rays are commonly sighted in the resort’s lagoon just offshore.

The resort will once again partner with The Manta Trust, one of the world’s leading manta ray research organisations, to co-host the retreat and offer guests an immersive, educational experience centred on marine conservation. The programme is designed for travellers seeking purpose-led experiences and a deeper understanding of manta rays within their natural environment.

Located on the edge of a UNESCO World Biosphere Reserve and adjacent to a known juvenile manta ray aggregation site, InterContinental Maldives Maamunagau provides direct access to key research and observation areas. During the retreat, guests will be able to participate in guided reef snorkelling, manta excursions led by The Manta Trust, coral restoration and planting workshops, and a series of educational sessions. Participants will also have the opportunity to adopt and name a manta ray as part of the conservation initiative.

The partnership between InterContinental Maldives and The Manta Trust has been in place since 2019. The retreat will be led by The Manta Trust’s base leader, Meral Hafeez, who will guide guests through manta ray encounters while sharing insight into the organisation’s ongoing research and conservation efforts in the surrounding waters. The programme offers participants a behind-the-scenes look at the daily work of the research team, including observing and recording manta ray behaviour.

In 2023, Maamunagau Lagoon was recognised as an Important Shark and Ray Area (ISRA), identifying it as a vital habitat for manta rays and a priority conservation site. The lagoon continues to serve as a key research area for The Manta Trust, allowing guests to observe manta rays in their natural environment within close proximity to the resort. Certified divers are also catered for, with access to dedicated dive sites where manta ray cleaning stations can be observed, highlighting the complex marine ecosystems of the Maldives.

Beyond the retreat activities, guests can enjoy the resort’s overwater villas, unwind at AVI Spa, or explore its range of dining experiences.

The participation fee for the Manta Retreat is USD 1,550++ per night, per room, based on double occupancy, with a minimum stay of four nights. The package includes one manta ray research trip, guided house reef snorkelling, manta ray adoption, educational workshops, and accommodation in a luxury villa or residence on a half-board basis.

Featured

Ten years of turtle conservation: Coco Palm Dhuni Kolhu and Olive Ridley Project milestone

Published

2 weeks ago

February 2, 2026

m@ldives

Coco Palm Dhuni Kolhu, part of the boutique island resort collective Coco Collection, is marking ten years of partnership with the Olive Ridley Project (ORP), celebrating a decade-long commitment to marine conservation in the Maldives.

The partnership reached a significant milestone in 2017 with the opening of the Maldives’ first veterinary-led Marine Turtle Rescue Centre at Coco Palm Dhuni Kolhu, pioneering specialised sea turtle care in the country. Since its establishment, the centre has treated and released 152 injured turtles, achieving a rehabilitation success rate of nearly 60 per cent. The facility plays a critical role in caring for turtles impacted by human activities, including entanglement in marine debris and ghost nets.

Beyond rescue and rehabilitation, the Olive Ridley Project leads long-term sea turtle research across the Maldives, collecting data on nesting activity, population trends and threats to marine life. This work contributed to the country’s first National Red List Assessment of Threatened Species, published in 2022. Supported by a network of citizen scientists, ORP’s Maldives research team has documented more than 45,000 sea turtle encounters nationwide. Over the past decade, Coco Collection has been a major contributor to this effort, recording nearly 3,500 encounters and reinforcing its position as one of ORP’s most significant research partners.

Guests at Coco Palm Dhuni Kolhu are invited to engage directly with these conservation initiatives through weekly marine talks, educational sessions led by the resort’s resident Marine Educator, and opportunities to witness rehabilitated sea turtles being released back into the ocean.

Commenting on the milestone, Siraj Waseem, General Manager of Coco Palm Dhuni Kolhu, said that celebrating ten years of partnership with the Olive Ridley Project was a source of pride for Coco Collection. He noted that what began as a shared commitment to protecting marine life has evolved into a long-term collaboration rooted in education, conservation and meaningful guest engagement, adding that the Marine Turtle Rescue Centre continues to grow in strength with ORP’s support.

Dr Martin Stelfox, Founder and Chief Executive Officer of the Olive Ridley Project, said the decade-long partnership reflects a pioneering collaboration and significant progress in sea turtle conservation in the Maldives. He highlighted advances in conservation medicine and research achieved together, as well as the impact of inspiring guests and Maldivian interns to care for and protect the country’s marine environment.

Over the past ten years, the ORP Marine Turtle Rescue Centre at Coco Palm Dhuni Kolhu has hosted ten veterinary surgeons, each contributing to the development of sea turtle conservation medicine in the Maldives. Through the Sea Turtle Veterinary Trainee Programme, the resort and ORP have trained 29 veterinary professionals from 12 countries, helping to strengthen a global network of sea turtle clinical care across the Indian Ocean and beyond.

Alongside its conservation work, Coco Palm Dhuni Kolhu continues to offer a wide range of experiences for guests, from water sports such as water skiing, surfing and parasailing to sailing, paddle-boarding and kayaking in the surrounding lagoon. Visitors can also explore Maldivian culture through curated Coco Experiences that highlight local island life and heritage. As the resort marks ten years of collaboration with the Olive Ridley Project, Coco Palm Dhuni Kolhu continues to demonstrate how meaningful conservation efforts can coexist with memorable guest experiences.