Common Snorkeling Injuries and How to Prevent Them

I've spent countless hours floating over reefs, coves, and open water—snorkeling, free diving, paddling. Snorkeling looks deceptively simple. You float, breathe through a tube, and watch the world below. But it's not a benign, low-risk activity. In Hawai‘i alone, snorkeling accounts for more visitor drownings than any other ocean activity, and the reasons are often misunderstood.

Let me walk you through the most common injuries—and more importantly, how to prevent them so you can stay safe.

1. Snorkel-Induced Rapid Onset Pulmonary Edema (SI-ROPE)

This is the most serious and least understood injury. SI-ROPE happens when the resistance to inhalation from a snorkel creates excessive negative pressure in your chest. That pressure can pull fluid from tiny blood vessels in your lungs into the air sacs—your lungs fill with fluid instead of air.

The typical sequence: Sudden shortness of breath, fatigue, loss of strength, then panic or doom, followed by fading consciousness. Crucially, it often happens without obvious struggle. The snorkeler simply stops breathing and sinks.

How to prevent SI-ROPE:

  • Choose your snorkel thoughtfully. The Snorkel Safety Study found that resistance varies dramatically between designs, and you can't judge it by looks. The Seaview 180 mask is engineered to support comfortable surface breathing and reduce CO₂ buildup compared to earlier full-face designs. But no snorkel eliminates resistance entirely—test yours in shallow, safe water first.
  • Avoid exertion while breathing through a snorkel. Don't swim hard, fight currents, or chase a boat while using one. If you need to exert, remove the snorkel and breathe normally.
  • If you feel short of breath, stop immediately. Remove your mask, roll onto your back, signal for help, and get out. Don't try to "push through."
  • Wait 2–3 days after long-haul air travel before snorkeling. The airplane's low pressure can subtly compromise your lung's air-blood barrier, making you more vulnerable.

2. Aspiration (Inhaling Water)

Contrary to popular belief, aspirating water is rarely the primary trigger for snorkeling incidents. The Snorkel Safety Study found it was seldom the cause of near-drownings. But it can still happen—especially if a wave hits you, your snorkel submerges, or you panic and inhale through your nose.

How to prevent aspiration:

  • Practice clearing your snorkel. Whether you use a traditional mouthpiece or a full-face mask like the Seaview 180, know how to clear the tube before you need to in an emergency.
  • Stay where you can touch bottom. Almost all incidents happen in water where the person can't stand. Stay shallow until you're confident.
  • Keep your mask on and face in the water. Lifting your head risks swallowing water. Use a mask with a wide field of view—like the Seaview 180—so you can see without lifting your head.

3. Hypoxia from CO₂ Rebreathing

For years, carbon dioxide buildup was blamed for snorkeling incidents, but the Snorkel Safety Study found no scientific evidence for CO₂ rebreathing as a major cause. Still, any snorkel that restricts airflow can lead to shallow, rapid breathing—which reduces oxygen intake and increases CO₂ retention. That can cause dizziness, confusion, and loss of consciousness.

How to prevent hypoxia:

  • Breathe slowly and deeply. Don't hyperventilate. The Seaview 180 has separate airflow channels for inhalation and exhalation to help minimize CO₂ buildup, but no mask fixes poor breathing habits.
  • Avoid snorkeling with respiratory or cardiovascular conditions without consulting a doctor first. Asthma, COPD, or heart failure increase your risk.
  • Take frequent breaks. Look up, remove your mask, and breathe normally for a minute. This resets your oxygen and CO₂ levels.

4. Ear and Sinus Barotrauma

Descend even a few feet and pressure increases. If you can't equalize, you can get pain, a ruptured eardrum, or sinus bleeding. This is especially common if you dive with a full-face mask that doesn't allow easy equalization.

How to prevent barotrauma:

  • Don't dive below the surface with a full-face snorkel mask. The Seaview 180 is for surface snorkeling only. For freediving, use a traditional mask and snorkel.
  • Equalize early and often. Gently blow against pinched nostrils as you descend. If you feel pain, stop and ascend slightly until it subsides.
  • Avoid snorkeling with a cold, sinus infection, or allergies. Congestion makes equalization hard and increases injury risk.

5. Sunburn and Heat-Related Illness

Sounds obvious, but I've seen it ruin more trips than any other injury. Reflected sunlight off the water can burn you in minutes, and the cooling effect of the water masks how hot you're getting.

How to prevent sunburn and heat illness:

  • Wear a rash guard or sun-protective shirt. The Seaview 180 covers most of your face, but your neck, shoulders, and back are exposed. Use reef-safe sunscreen on all exposed skin.
  • Stay hydrated. Drink water before and after. Dehydration increases your risk of both heat illness and SI-ROPE.
  • Take breaks in the shade. Every 20–30 minutes, get out, find shade, and reapply sunscreen.

6. Cuts, Scrapes, and Marine Life Encounters

Coral, rocks, and marine animals can cause painful injuries. Coral cuts are especially nasty—prone to infection and slow to heal. Stings from jellyfish, fire coral, or sea urchins can also ruin your day.

How to prevent marine injuries:

  • Keep your hands to yourself. Look, don't touch. Even harmless-looking creatures can sting or bite.
  • Wear reef shoes or booties if entering from a rocky shore or shallow reef.
  • Know local marine life. Ask lifeguards or dive shops what's common—jellyfish, stonefish, etc.
  • If you get cut, clean the wound immediately with fresh water and apply antiseptic. Coral infections can develop fast.

Final Thoughts: Safety Is Your Responsibility

Here's the honest truth: no piece of equipment—including the Seaview 180—can guarantee your safety. The mask is designed to support comfortable surface breathing and reduce CO₂ buildup, but it's recreational gear, not medical or life-saving equipment. Your safety depends on:

  • Proper fit and seal—a mask that leaks or is too tight can cause discomfort and distraction.
  • Your health—if you have any heart or lung condition, get medical advice before snorkeling.
  • Environmental conditions—waves, currents, water temperature, and exertion all affect breathing comfort.
  • Your judgment—if you feel off, get out. Period.

Snorkeling is one of the most beautiful ways to experience the ocean. I've spent hundreds of hours floating above coral gardens, watching sea turtles glide past, and