Is Scuba Diving Deep Better?
When it comes to scuba diving, many people assume that going deeper means a more thrilling experience. However, in tropical waters like here in Phuket, Thailand, shallower dives often offer richer marine life and more vibrant coral formations. This is because corals rely on sunlight for photosynthesis, which is more abundant in shallower waters. Diving at shallower depths not only allows you to see a wide variety of colourful corals and diverse marine species but also typically provides longer dive times due to reduced nitrogen absorption. In this blog, we’ll explore the benefits of diving in shallower waters and why deeper isn’t always better when it comes to enjoying the underwater world.
Why I like Shallow Dives
I often find myself puzzled when I receive emails from divers asking about the depths of dives and assuming that going deeper will result in seeing more marine life. Is deeper always better when it comes to scuba diving?
One of the most common myths in scuba diving is that going deeper means encountering more marine creatures. In reality, coral reefs thrive in shallower waters because they need clear water and sunlight to flourish. This is why the most vibrant coral is typically found closer to the surface. Healthy coral reefs support abundant marine life since many fish feed on corals, making them a crucial food source. Therefore, more coral often translates to more fish and marine diversity.
Being closer to the surface also means there is more natural light, making it easier to spot and appreciate the vibrant colours and details of marine life. Light is essential for perceiving colour, and as you descend deeper into the water, the light diminishes, reducing visibility and colour intensity. This is similar to turning off the lights in your house or stepping outside at night when colours become muted and details are harder to discern. The abundance of light near the surface enhances visibility and brings out the vivid colours of the underwater world, offering a more enjoyable and visually stimulating dive experience.
The closer you are to the surface, the warmer the water tends to be. As an avid warm-water diver, I love diving in nothing more than board shorts and a rash guard. Most shallow dives allow you to avoid thermoclines—sudden temperature changes in the water—which makes the dive much more comfortable and enjoyable.
Diving at shallower depths also means that your air supply lasts longer. The deeper you go, the more air you consume, which shortens your dive time. In shallow waters, most divers can easily enjoy a dive lasting an hour or more. In contrast, I’ve seen certified divers use up a tank of air in just 20 minutes at greater depths. Generally, shallow dives mean more time to explore and enjoy the underwater world.
Shallow dives are also easier and safer, with a lower risk of decompression sickness. While we should always prioritize safety in diving, shallow dives generally pose less of a threat in terms of no-decompression limits, gas narcosis, air consumption, and decompression sickness.
For me, a simple dive in warmer waters, where I can enjoy vibrant colours and abundant fish, is very appealing. Although some divers prefer going deeper, and I don’t begrudge them that choice, I find shallow dives to be more rewarding. More time underwater, less equipment, and more vibrant life make shallow dives a compelling choice.
