Isla Caja de Muertos Snorkeling & Hiking Excursion

Isla Caja de Muertos is a protected natural reserve, so the reefs and marine life are healthier and more abundant than at many other snorkeling spots. The water is exceptionally clear, often providing visibility of 30–50 feet, making it easier to see fish, coral, and underwater formations. Because the island is relatively remote and less crowded, snorkelers can enjoy a more peaceful, immersive experience. The combination of calm waters, coral reefs, and a variety of marine habitats makes it ideal for both beginners and experienced snorkelers. You can also pair snorkeling with hiking trails on the island, exploring the lighthouse and sandy beaches, which few other snorkeling destinations in Puerto Rico offer.

Snorkelers can expect a diverse mix of tropical fish including parrotfish, angelfish, damselfish, and butterflyfish. The coral reefs are home to sea fans, sponges, and smaller reef organisms that provide structure for the ecosystem. Occasionally, visitors may spot sea turtles gliding along the reef, small rays, and nurse sharks resting in deeper areas. Crustaceans like crabs and shrimp hide among the corals, and colorful starfish and sea urchins are often visible on the sandy patches. The reef structure and abundant marine life make the snorkeling both visually exciting and educational, especially for anyone interested in observing a healthy Caribbean reef ecosystem.

Common sunscreens contain chemicals that can harm coral reefs, as the particles are small enough to be absorbed by corals, causing toxicity and coral bleaching. Reef-friendly sunscreens are formulated without these harmful chemicals. Reef-SAFE sunscreens go a step further by using non-nano particles, which are too large for corals to ingest, helping to preserve marine ecosystems. 

Please avoid sunscreens with oxybenzone, octinoxate, and parabens. Consider wearing sun-protective clothing, like long-sleeve rash guards, as an alternative to sunscreen. If you choose a mineral-based sunscreen, ensure it is labeled ‘non-nano.’

Shark incidents in Puerto Rico’s waters are extremely rare, and serious injuries are even rarer. When you enter the ocean, it’s important to remember that it’s a natural, wild environment with many types of marine life, including sharks. Although the chances of a shark-related injury are very low, they are still part of the ocean’s ecosystem, and the ocean should be approached with respect. By learning about sharks and following safety guidelines, you can minimize even this small risk.

Yes, snorkels allow you to breathe with your face in the water at the surface. If you’d like to dive down, though, water will enter the snorkel, so you’ll need to hold your breath until you resurface. Once back at the surface, you can clear the snorkel by blowing out the air in your mouth hard. That should clear the snorkel, but if it doesn’t, tread the water, remove the snorkel from your mouth and dump the mouthpiece out.

Standard eyeglasses can’t be worn with a snorkel mask, but prescription masks are available for those who need vision correction while snorkeling. If you’re interested, consider looking into a prescription mask option before your tour. Alternatively, contact lenses can be worn under a snorkel mask, though it’s best to close your eyes if water enters to prevent losing a lens.

You can snorkel with a beard or mustache but it can prevent a tight seal between the mask and your face, which may cause water to leak in. It is often recommended to shave at least your mustache before snorkeling. If you’d prefer not to shave your mustache, please bring petroleum jelly or chapstick with you. If you coat your mustache in that chapstick or jelly, it may be able to seal and prevent water from getting in.

TripOutside recommends knowing how to swim before snorkeling, but participation is ultimately up to you and the tour operator's discretion.

• Check ocean conditions and only snorkel at lifeguarded beaches. The chance of rescue is much higher with trained lifeguards present.
• Never snorkel alone. Always bring a buddy. Beginners should consider booking a guided tour.
• Rest after flying. Flying can dehydrate and exhaust you—give your body at least a day to acclimate before snorkeling.
• Test your gear on land or in a pool first. Make sure your mask fits snugly, you can breathe through the snorkel, and you know how to clear water if needed.
• Practice with fins. You should be able to scissor kick while swimming. Avoid doggie paddling—it won’t get you far.
• Don’t wear fins on land. Walk into the water, get past the waves, then put your fins on. Remove them before exiting.
• Take it slow. Breathe calmly, relax, and avoid overexertion to keep your heart rate low.
• Know your limits. If you’re feeling tired, anxious, or unsure about conditions, skip the snorkel session. Panic in the water is dangerous.
• Stay aware of currents and tides. Even experienced swimmers can get pulled out. Know how to identify rip currents and how to escape them (swim parallel to shore).