*Beluga Whale off Churchill, Canada.* 1/400, f9, ISO 1000.

This is Part 2 of 10 Part Underwater Natural Light Photography Series.

When shooting underwater using natural light, the euphotic zone is your playground. This is the uppermost layer of water that sunlight penetrates, and it’s where natural light photography truly comes to life. Understanding how light interacts with water in this zone is essential for creating stunning underwater images.

What is the Euphotic Zone?

The euphotic zone is the part of any body of water that receives bright and clear sunlight. Even in turbid, murky water, there’s always a euphotic zone—though it might only extend a few inches deep. In the tropics, where water clarity is exceptional, the euphotic zone can extend well beyond 260 feet—far past recreational diving depths.

This zone is where sunlight, or ambient light, allows photographers to capture natural, vibrant underwater scenes. For those relying on natural light, the euphotic zone is your best friend.

*Pink Dolphin in the Amazon River, Brazil.* 1/320, f5.6, ISO 2000

Here are two examples of wildlife thriving in very different Euphotic Zones: the pink dolphin of the Amazon River and the lemon shark of the Bahamas. Each represents the unique beauty and diversity of life in their distinct aquatic worlds. The pink dolphin thrives in the dim, low-light conditions of the Amazon River, navigating its murky waters with remarkable adaptations that allow it to flourish in this unique environment. In stark contrast, the lemon shark thrives in the clear, sunlit waters of the Bahamas, where high visibility and abundant light create the perfect conditions for this sleek predator to navigate and hunt.

*Lemon Shark at Tiger Beach, Bahamas.* 1/320, f8, ISO 400

How Light Behaves Underwater

Light behaves very differently underwater than it does on land. Water is about 800 times denser than air, which causes light to scatter and absorb quickly as it penetrates. The deeper you go, the more light—and color—you lose.

*Hawksbill Sea Turtle off Playa Del Carmen, MX.* 1/320, f5, ISO 800

Here’s how color disappears at different depths:

Red vanishes around 15 feet.
Orange fades by 30 feet.
Yellow disappears by 60 feet.
Green is absorbed around 100 feet, leaving only blues.

This means that the deeper you dive, the more muted and monochromatic your images will appear. Natural light photographers need to work within these limitations to create vibrant and well-exposed photos.

*Whale Shark off Isla Mujeres, MX.* 1/320, f9, 1/800

Tips for Working in the Euphotic Zone

Stay Shallow:
The closer you are to the surface, the more light and color you’ll have. For the best results shoot wildlife above 30 feet where reds and oranges are still visible.
Time Your Dives:
Early morning and late afternoon offer soft, diffused light that can add mood and dimension to your photos. Midday dives provide the most light penetration, which is great for capturing vibrant colors at deeper depths.
Understand Water Clarity:
Clear tropical waters extend the depth of the euphotic zone, while murky or nutrient-rich waters will reduce it significantly. Adjust your expectations and camera settings accordingly.
Position the Sun Behind You:
Just like on land, keeping the sun at your back ensures your subject is well-lit and shadows are minimized. Unless you are going for an artsy image and then you want your subject to be backlit by the sun.

*Tiger Shark at Tiger Beach, Bahamas.* 1/250, f8 ISO 400

The Challenges of the Euphotic Zone

Natural light photography in the euphotic zone is not without its difficulties. Clouds, tides, and weather can all affect light penetration. Additionally, the further you descend, the harder it becomes to maintain vibrant colors without proper camera settings and techniques like custom white balance (which I’ll cover in a future post).

Why the Euphotic Zone is Worth It

Despite the challenges, the euphotic zone offers unparalleled opportunities for natural light photographers. The sunlight filtering through water creates breathtaking effects, like god rays that cut through the blue, or the shimmering light patterns on the ocean floor. These natural phenomena can add depth and drama to your images, creating compositions that feel both authentic and otherworldly.

*Sealion off Baja, MX.* 1/400, f9, ISO 640

In the Next Blog

Now that you understand the importance of the euphotic zone and how light behaves underwater, the next step is mastering your custom white balance. This is the key to overcoming color loss and ensuring your images reflect the true beauty of the underwater world.

THIS IS PART 2 OF A 10 PART SERIES.

PART 1 - Is Natural Light Photography for you?

Photographing wildlife has always been one of my greatest passions. There's nothing quite like the thrill of capturing a great image of an animal in its natural habitat, whether it’s a tiger prowling through the forest or an orca, mom and calf swimming through the ocean.

Over the years, I’ve learned that getting the perfect shot is more than just having a good camera; it’s about understanding the behavior of the animals and being prepared to capture those fleeting moments.

Here are some essential tips I’ve gathered from my own adventures in the wild, which I hope will help you capture stunning wildlife photos of your own.

1. Understand Animal Behavior

One of the first things I realized early on is the importance of understanding the animals you’re photographing. Every species has unique behaviors, and being familiar with these can help you anticipate their movements.

For example, if you’re photographing a fox, knowing that they tend to be more active at dawn and dusk can guide you on the best times to shoot. Similarly, understanding that a perched bird will often defecate right before flight can help you prepare for the perfect shot just as it takes off.

This type of knowledge has helped me capture some of my most cherished photos.

2. Choose the Right Camera Settings

When it comes to wildlife photography, your camera settings can make or break your shot. Fast-moving animals require a faster shutter speed to freeze the action. I typically set my shutter speed to at least 1/2000th of a second for fast-moving subjects like birds or big cats.

If you’re photographing slower animals, such as tortoises or resting deer, you can afford a slower shutter speed.

Aperture settings also play a crucial role. A wider aperture (like f/2.8 or f/4) allows for a shallow depth of field, making your subject stand out against a beautifully blurred background. This works wonderfully when photographing animals in dense foliage or when you want to isolate them from a busy environment.

3. Be Patient and Stay Ready

Patience is your best friend in wildlife photography. I’ve spent countless hours sitting quietly, waiting for that perfect moment.

Whether it’s waiting for a bobcat to pop out of the bushes to catch a bird, or for a breaching whale, those moments don’t come on command.

But trust me, the wait is always worth it… so always have your camera ready.

Wildlife is unpredictable, and you never know when an animal will make a sudden move. Keep your camera on and your finger on the shutter. A quick reflex can mean the difference between capturing a fleeting moment, or missing it altogether.

4. Focus on the Eyes

There’s a saying in wildlife photography: “If you can see the eyes, you can see the soul.” I find this to be true.

Focusing on the animal’s eyes can create a powerful connection between the subject and the viewer. It brings life to the photo and can tell a good story.

Whenever possible, try to lock focus on the eyes of the animal.

5. Respect Wildlife and Their Habitat

Last but certainly not least, ALWAYS respect the wildlife and their natural environment. Keeping a safe distance not only protects you but also prevents stress to the animals.

Remember, we are guests in their world.

Wildlife photography is an art that combines technical skill with a deep respect for nature. Every shot is a new adventure, a new story waiting to be told. So grab your camera, do your research, be patient, and above all, enjoy every moment in the wild.

Happy shooting!

The Euphotic Zone: Your Best Friend in Natural Light Photography