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What Is Underwater Photography?

Underwater photography is exactly what it sounds like — capturing images beneath the surface of water, whether that’s a swimming pool, a freshwater lake, or the open ocean at 130 feet. It combines photography skills with diving ability and demands solutions to problems that don’t exist on land: your camera is surrounded by a medium that absorbs light, distorts distances, and would destroy your equipment if it got inside.

The Physics That Make Everything Harder

Water changes the rules of photography in ways that catch people off guard.

Light disappears fast. Water absorbs light roughly 1,000 times more efficiently than air. Red wavelengths vanish first — by about 15 feet deep, everything looks blue-green. By 60 feet, even blues start to dim. Below 200 feet, without artificial light, it’s essentially dark. This is why underwater photographers are obsessed with strobes and getting close to their subjects.

Everything looks bigger and closer. Water refracts light, making objects appear about 25% larger and 33% closer than they actually are. Your brain adjusts somewhat, but your camera doesn’t. This affects focus accuracy and composition — you might think you’re at the right distance for a shot, but your framing will be tighter than expected.

Particles scatter light. Even clear ocean water contains suspended particles — plankton, sand, organic matter. Put light between your camera and subject, and these particles scatter it back toward the lens, creating “backscatter” (the underwater equivalent of a flash illuminating falling snow). This is why underwater strobes are mounted on arms that position them to the side, angled to light the subject without illuminating the water column directly in front of the lens.

Essential Equipment

Housing — Your camera needs a watertight enclosure. Options range from $30 phone cases to $5,000 aluminum housings for professional cameras. The housing must have controls for every camera function you need access to — shutter, aperture, focus, zoom — all operated through sealed buttons and dials. A single failure means a flooded, ruined camera.

Strobes — External flash units are practically mandatory for serious underwater work. They restore the warm colors that water strips away. Most setups use two strobes mounted on articulating arms, positioned to light the subject evenly while minimizing backscatter.

Wide-angle and macro lenses — These are the two workhorses. Wide-angle (typically a fisheye or rectilinear wide lens) captures reef scenes, large marine life, and underwater landscapes. Macro lenses capture the tiny creatures — nudibranchs, shrimp, seahorses — that are often more photogenic than big animals.

Dome port vs. flat port — Wide-angle lenses require a dome-shaped port on the housing to correct for refraction. Macro lenses use flat ports. Using the wrong port type produces severely degraded images.

Techniques That Actually Work

Get close, then get closer. The single most repeated piece of underwater photography advice, and it’s correct. Every inch of water between your lens and your subject reduces contrast, sharpness, and color. Shoot from 3 feet away and you’ll get better results than from 6 feet with a longer lens — even though the framing is similar.

Shoot upward. Positioning yourself below your subject and shooting toward the surface creates dramatic backlighting and separates the subject from the background. Silhouettes of manta rays, sharks, or divers against the bright surface are among the most powerful underwater images.

Master buoyancy first. You can’t take steady photos if you’re drifting, sinking, or kicking up sand. Good buoyancy control — the ability to hover motionless at any depth — is a prerequisite for quality underwater photography. This is why most dive instructors recommend completing at least 50 dives before adding a camera.

Patience beats gear. The best underwater photos happen when you find an interesting subject, settle into position, and wait. Marine creatures that initially flee will often return or resume natural behavior if you stay still. Chasing subjects produces mediocre shots and stressed animals.

The Environmental Dimension

Underwater photography carries a responsibility that terrestrial photography rarely does. Coral reefs, the most photogenic underwater environments, are also among the most fragile ecosystems on Earth. A careless fin kick can break coral that took decades to grow. An anchor dropped on reef can destroy a century of growth.

Responsible underwater photographers follow strict guidelines: maintain neutral buoyancy to avoid contact with the bottom, never touch or harass marine life for a better shot, and avoid using excessive flash on sensitive species. Organizations like the Reef Environmental Education Foundation promote photography practices that document marine life without damaging it.

The good news is that underwater photography has been a powerful force for ocean conservation. Images of vibrant coral reefs, graceful whale sharks, and bizarre deep-sea creatures create emotional connections that scientific papers alone can’t achieve. David Doubilet’s work for National Geographic, Laurent Ballesta’s deep-diving expeditions, and countless amateur photographers sharing reef images on social media have all contributed to public awareness of ocean conservation needs.

Getting Started

The lowest-barrier entry point is a waterproof action camera (GoPro or similar, $200-$400) and a snorkel. Shallow reefs in tropical locations offer incredible subjects within breath-hold depth. You’ll learn composition and the basics of underwater light without the complexity of scuba equipment.

If you’re already a certified diver, a housing for your existing camera is the next step. Expect to spend $300-$1,500 depending on your camera model. Add a single strobe ($200-$600) when you’re ready to get serious about color and lighting.

The learning curve is steep, and your first hundred shots underwater will probably be disappointing. That’s normal. The ocean doesn’t care about your camera settings — it operates on its own schedule, and your job is to be ready when something extraordinary swims past.

Frequently Asked Questions

What camera do I need for underwater photography?

You can start with any waterproof camera or a regular camera in a waterproof housing. GoPro and other action cameras work for casual underwater shots. Serious underwater photographers use mirrorless or DSLR cameras in custom aluminum housings from brands like Nauticam or Ikelite, which can cost as much as the camera itself. The housing must be rated for the depths you plan to shoot at.

Why do underwater photos often look blue or green?

Water absorbs red light first, then orange and yellow, as depth increases. By 15 feet (5 meters), most red light is gone, leaving everything looking blue-green. Photographers compensate using strobes (underwater flashes) that restore full-spectrum light, or by adjusting white balance in post-processing. Getting close to subjects — within 3 to 6 feet — also helps because there's less water between camera and subject to filter out warm colors.

Do I need to be a certified diver to do underwater photography?

For anything beyond snorkeling depth, yes. Most underwater photography happens while scuba diving, which requires certification (PADI Open Water or equivalent). You should be a confident, comfortable diver before adding camera equipment — managing buoyancy, air consumption, and a camera simultaneously is challenging. Many dive organizations offer specialty courses in underwater photography.

Further Reading

• NOAA Ocean Exploration — Underwater Imaging
• Smithsonian Ocean — Photography
• National Geographic — Ocean Photography