Horseshoe Crabs on Rawa Island

The horseshoe crab is not actually a crab (Photo by Kev McLoughlin) The horseshoe crab is an ancient creature that was around way before the dinosaurs 445 million years ago and has not really changed: they are known as “living fossils”. This marine animal is an arthropod, closely related to the well-known scorpions and spiders... Read more »

Is Diving Dangerous? How Do Experienced Divers Find Themselves in Trouble?

In a recent discussion, a group of instructors and I were talking about an article recently published by the BBC (Link to BBC Article) where a group of instructors went diving together to find nudibranchs at 40 metres. The questions kept coming up: Is diving dangerous? How do experienced divers find themselves in trouble? In... Read more »


How Do Coral Reefs Support Us In Our Everyday Lives?

Corals are tiny animals that, collectively, play a huge role in the marine environment. They are also very valuable to people through the many ecosystem services they provide. These are services that we benefit greatly from and that nature provides for free, such as oxygen production by plants or water filtration by wetlands. One of... Read more »


How to choose your next regulator

Types of Regulators There are a wide range of regulators to choose from. The ones you’ve most commonly heard of are the balanced and unbalanced regulators, and among those are diaphragm and piston regulator systems. There are several makes and models which produce variations of the same concept. The two main types of regulators are... Read more »


SJII Camp at Orca Maka-Maka

The Camp Last month, students from SJII (St. Joseph's Institute International) took part in a variety of training courses during a trip to Lembeh, Indonesia, the home of Orca Maka-Maka. The Group This trip, the first official Orca dive trip to the Lembeh Strait in Indonesia, saw students taking part in multiple PADI courses, including... Read more »

Downward Dog – 10 Tips to Get the Most Out of Yoga’s Most Famous Posture

Downward Dog is probably the most famous of all yoga postures. In flowing styles of yoga, such as Vinyasa or Ashtanga, Downward Dog is used to transition from standing to seated postures and back up again. It is also treated as a resting posture. If the idea that Downward Dog is a resting posture is... Read more »


Scariest Moments Underwater

We Asked 5 Diving Instructors to Reveal Their Scariest Moments Underwater - Don't Read if You Have a Weak Constitution First and foremost, any dive instructor would tell you exactly what I am about to - diving is not scary. I am more at ease under the water than on the surface. The soothing in... Read more »


We asked Five Professional Dive Instructors What Their Most Precious Piece of Dive Equipment Was. The Results Were Not What We Expected!

We Asked Five Professional Dive Instructors What Their Most Precious Piece of Dive Equipment Was. The Results Were Not What We Expected! Equipment is very personal and having your own can make your dives so much more enjoyable. Why get your own equipment? No blisters from fins that don’t fit, better buoyancy from a BCD... Read more »

Letter from our Founder and Chief Orca – Jeroen van de Waal

Dear Orca customers, colleagues and partners, 2017 was a year full of achievements for Orca. We launched our book Together We Can Turn Tides – a fantastic team effort – at the S.E.A. Aquarium. To date, we have distributed 2,000+ copies and more than 2,000 children of various schools in Singapore and Malaysia attended our... Read more »


School Camps in South East Asia – Was This Our Best Yet?

Last month a group of 15 students from Yale NUS College joined Orca for a week long camp, filled with wildlife and underwater activities. This time they spent the week on the beautiful island of Pulau Weh, Indonesia, enjoying a packed schedule of wildlife tours, adventures, snorkelling and diving. Often, many of the students attending... Read more »