Thailand Whale Sharks expedition 2024: A diving cruise animated by a marine biologist talking about whale sharks (2024)

Another fantastic marine biologist onboard!

Our adventure set sail on a thrilling expedition dedicated to the majestic whale sharks of the Andaman Sea. With divers from England, France, and Brazil eagerly joining us onboard, the anticipation was palpable as we embarked on this special journey. We were honoured to have Kirsty Magson, a marine biologist based in Thailand who started Thai Whale sharks project in 2017 to identify and monitor these gentle giants. Kirsty joined us for the fourth time this year, enriching our experience with her invaluable knowledge and passion for these magnificent creatures through daily presentations about what scientists know of Whale sharks but also about the marine environment they live in.

Starting up in Surin national park and Richelieu rock

Our voyage began on the 19th of March as we bid farewell to Khao Lak and headed towards the Surin Islands National Park. Over the course of the first two days, we immersed ourselves in the underwater wonders of Richelieu Rock, renowned as one of the best dive sites worldwide and one of the best spots in Thailand to encounter Whale Sharks.

The conditions were ideal, and despite not encountering any shark, we witnessed a plethora of marine life in its colourful seascape: From schools of big-eyed trevally and chevron barracuda to solitary great barracuda and massive groupers, every dive was a mesmerizing encounter with the ocean's biodiversity. For macro enthusiasts, the discovery of a tiny baby tigertail seahorse, along with sightings of harlequin shrimp, ghost pipefish, and clownfish eggs, added an extra layer of excitement to our underwater explorations.

Koh Bon and Koh Tachai

On Day 3, we found ourselves at Koh Tachai, diving amidst crystal-clear waters and vibrant marine ecosystems. Strong currents greeted us on our first dive, bringing with them an abundance of life in the blue depths. Chevron barracuda, batfish, and even a blacktip shark made appearances, offering thrilling encounters for our divers. The second dive, with calmer conditions, allowed us to leisurely explore the pinnacle, marveling at the diversity of marine life, from groupers and surgeonfish to butterflyfish and the intricate architecture of a lobster's nest. As the day progressed, we ventured deep into the Koh Bon pinnacle, where a massive school of big-eyed trevally mesmerized us with their synchronized movements.
The highlight of the day awaited us as we delved into the mysterious world of Black Water Diving. Setting our boat at a depth of 100 meters, we created a vertical line with lights, inviting our guests to witness the mesmerizing spectacle of the ocean's nighttime migration. Over the course of an hour, we were treated to sightings of rare and peculiar creatures, providing a glimpse into the enigmatic depths of the ocean.

Similan islands

Our expedition continued with exploration of the Similan Islands on Day 4. Diving in the clear and warm waters of Three Trees, Elephant Head, and West of Eden, we were fortunate to encounter turtles, ribbon eels, ghost pipefish, and even the elusive pegasus sea moth. The sighting of the pegasus sea moth was particularly special, as it is rarely seen in these waters. We've seen them in Mergui Archipelago and Koh Lipe before but only James, who has been diving the Similan islands for the past 22 years, had seen them in the similan islands before and he had been waiting 10 years to witness this remarkable creature again.

Thailand Whale Sharks expedition 2024: A diving cruise animated by a marine biologist talking about whale sharks (7)

Seamoths “walk” along the bottom with modified pelvic fins and use their toothless, tube-like mouths mouths to suck up worms and other invertebrates.

South Andaman

On Day 5, we ventured to Hin Deang and Hin Muang, where we encountered stonefish and ghostfish, adding to the intrigue of our underwater adventures. Day 6 brought us to the Koh Lipe area, where we were treated to sightings of a frogfish and seahorse at 8 miles, along with exploring dive sites like Stonehenge, Honeycomb, and Koh Taru.Want to know how to differentiatea stone fish from other scorpionfish? Read this article!

Thailand Whale Sharks expedition 2024: A diving cruise animated by a marine biologist talking about whale sharks (8)

eggs of a harlequin ghost pipe fish

Thailand Whale Sharks expedition 2024: A diving cruise animated by a marine biologist talking about whale sharks (9)

Stonefish

As our expedition drew to a close, we spent Day 7 exploring the wonders of Koh Haa, including the Cathedral dive site where we witnessed a vibrant Nudi festival, showcasing a variety of nudibranch species. The Chimney dive site provided further excitement with its unique underwater formations.

On Day 8, our final day of diving, we visited Bida Nok and Shark Point, where we encountered an array of marine life, including blacktip sharks, sea snakes, cuttlefish, and a mesmerizing school of squid. As we bid farewell to the Andaman Sea, our hearts were filled with gratitude for the unforgettable experiences shared and the incredible diversity of marine life encountered during our expedition.

Unfortunately Franck, owner and onboard photographer wasn't onboard on this trip so I took the liberty to use some older photos to illustrate the article with what was seen this week. I hope you'll like this article and feel free to share it or leave us a comment below! Follow us for more fishy stories :)

Thailand Whale Sharks expedition 2024: A diving cruise animated by a marine biologist talking about whale sharks (2024)

FAQs

What time of year are whale sharks in Thailand? ›

Best Time to See Whalesharks in Thailand

There are normally most whale shark sightings in April and during February/March if you're lucky. Most of these are at Richelieu Rock, on the schedule of most Similan Islands Liveaboards. Apart from whale sharks, the last few seasons have been very good for Manta Rays.

Why are whale sharks prone to injury from tourist boats? ›

Whale sharks spend a lot of their time cruising just below the ocean surface, often feeding on microscopic animals called zooplankton, which can put them in the direct path of a ship. If a large one collides with a whale shark, the shark probably stands little chance of survival.

What are the main threats to whale sharks around the world? ›

The greatest threats to the whale shark population are targeted fisheries, bycatch in nets, unsustainable tourism, and vessel strikes. Large-scale takes of whale sharks have increased due to overfishing in several areas, including in southern China.

What happens if whale sharks go extinct? ›

What would happen if whale sharks weren't around? Because whale sharks have no natural predators, they're considered apex predators. Scientists have observed that in ecosystems where apex predators have become extinct, the population numbers of the creatures that they prey on swells dramatically.

How big are the whale sharks in Thailand? ›

Largest not only in Thailand but in all of the world. Whale sharks are the biggest sharks on the planet with lengths of over 12 meters. And they are at the top of the wish list for many divers.

What is the best month to swim with whale sharks? ›

Whale Shark Season in Cancun & Cozumel

The peak of the season is during July and August. During this great time to swim with whale sharks in Cancun, you can see 30 to 40 specimens in one excursion near Isla Mujeres or Isla Holbox.

Why can't you dive with whale sharks? ›

As a protected species, you're not allowed to scuba dive with the whale sharks, but can snorkel with them from the surface.

How do cruise ships avoid hitting whales? ›

For cruise ships, avoiding a whales requires that the captain, pilot, or other bridge personnel detect the whale at a sufficiently large enough distance to change course or speed. This often means detecting the whale several kilometers away.

What are the dangers of swimming with whale sharks? ›

Although they can reach up to 20 meters in length, this shark is totally harmless to humans.

What are whale sharks afraid of? ›

The whale shark is well adapted to its environment. Its monumental size is its greatest protection and adults have little to fear from natural predators except for humans.

What is the lifespan of a whale shark? ›

Whale sharks inhabit the open waters of all tropical oceans. They are rarely found in water below 21 °C (70 °F). Whale sharks' lifespans are estimated to be between 80 and 130 years, based on studies of their vertebral growth bands and the growth rates of free-swimming sharks.

What eats whale shark? ›

There are very few known predators of the whale shark, although blue marlin and blue sharks sometimes prey upon small individuals. The most significant threat to this species appears to be humans.

What is the biggest shark in the world that is extinct? ›

NPR / KCRW - The megalodon went extinct 3.6 million years ago, and is thought to be the largest shark that ever swam the Earth.

What is the biggest shark in the world? ›

The biggest shark in the world is the whale shark

Though there are some reports of larger individuals, the biggest specimen ever reliably measured was 18.8 metres or nearly 62 feet long! That's bigger than a school bus!

What is the largest shark in the world? ›

The largest is the whale shark, which has been known to get as large as 18 meters (60 feet). The smallest fits in your hand. And the great white shark is somewhere in the middle. See photos and learn more about the wide diversity of sharks, read 5 reasons to revere sharks, and see even more articles about sharks.

Where can I see whale sharks Thailand? ›

Koh Tao. – Koh Tao is an island in the Gulf of Thailand and is a world-renowned diving destination. Whale sharks are often seen around Chumphon Pinnacle, Southwest Pinnacle, and Shark Island, three dive sites located near Koh Tao.

What Time of year are whale sharks in Koh Tao? ›

Whale sharks on Koh Tao are actually not as rare as you might think! After all, its whaleshark season. Actually, the season usually starts around late March and continues through till early June but as everyone knows we've not been able to go diving for the last 6 weeks.

Can you see whales in Thailand? ›

Gulf of Thailand (Koh Samui, Koh Tao, Koh Phangan):These islands in the Gulf of Thailand offer opportunities for dolphin and whale watching tours. You can find tour operators on each island that organize boat trips to spot these marine mammals.

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