7 Must-See Bioluminescent Bays and Beaches

You might have seen it in the Academy Award-winning film “Life of Pi”—a blue glow that grows as the main character, Pi swirls the water. While this might be CGI’s work in the movie, it’s a real phenomenon. In bodies of water around the world, bioluminescent creatures, typically plankton, light up like a firefly when moved, producing an electric blue glow. The occurrence is more common than you might think, but you must know where to look. Here, we name seven locations where you can experience the otherworldly wonder.

Pro tip: Keep an eye on the moon cycle. The waters will glow most during a new moon. The less light, the better!

Be sure to check local swimming regulations since some bioluminescent algae are toxic/not swimmable.

Additional reporting by Megan Johnson

1. Sam Mun Tsai Beach, Hong Kong

Bioluminescence in Jervis Bay, Australia

A phenomenon known as red tide (which is, as you might have guessed, when the water turns red, due to a bloom of microorganisms) has been linked to bioluminescence. This is the case with Sam Mun Tsai Beach in Hong Kong, which sometimes has crimson water during the day and glowing blue water at night. Unfortunately, certain types of red tide can be harmful to other organisms, so it’s best to ask authorities before swimming in affected waters.

Where to Stay Nearby: Y Loft (Youth Square)

Y Loft Youth Square offers a variety of amenities for budget-conscious travelers. The hostel features leisure spaces like a terrace, garden, and arcade/game room. Guests can stay connected with free WiFi and enjoy conveniences like laundry facilities and a gym.

2. Manasquan, New Jersey

The glowing water off the coast of New Jersey is not from toxic sludge, as one might assume, but from red tide algae. While the glow doesn’t occur all the time, lucky beachgoers might spot glowing blue waves at night.

Where to Stay Nearby: Inn on Main

The Inn on Main in Manasquan, New Jersey offers a unique boutique stay in the heart of the Jersey Shore. This Nantucket-shingle-styled inn boasts just 12 individually designed rooms, most with fireplaces for a cozy touch. In-room amenities include private bathrooms, mini-fridges, coffee makers, and balconies in many rooms.

3. Toyama Bay, Japan

Located on the northern shores of the Hokuriku region of Honshu, Toyama Bay does not glow because of algae; rather, it glows because of squid—firefly squid, to be exact. While these specimens typically live deep in the sea, an unusual current brings them to the surface in this bay. In the town of Namerikawa, there’s a museum dedicated to firefly squid.

Where to Stay Nearby: Natural Hot Springs Toyama Onyado Nono

Natural Hot Springs Toyama Tsurugi no Yu Onyado Nono offers travelers a relaxing and culturally immersive stay in Toyama. The hotel’s crown jewel is undoubtedly the natural hot springs (onsen) on-site, offering a chance to unwind in rejuvenating waters. Beyond relaxation, reviews point to the hotel being family-friendly and conveniently located near public transport and Toyama City attractions.

4. Mosquito Bay, Puerto Rico

Perhaps the most famous glowing bays, Mosquito Bay on Puerto Rico’s island of Vieques is a popular tourist destination. As such, there are very specific rules in place to protect it. For instance, kayaking the bay is only permitted with licensed tour guides, visitors cannot swim in the bay, and visitors can’t wear chemicals on their bodies. (That’s right—no bug spray in Mosquito Bay.)

Where to Stay Nearby: Hacienda Tamarindo

Hacienda Tamarindo offers a charming escape for travelers seeking a more intimate and personalized experience. This hotel goes beyond a typical stay, with custom-ordered breakfasts, daily interaction with friendly staff who can arrange everything from bioluminescent bay tours to local recommendations, and an overall sense of warm hospitality. The property boasts breathtaking ocean views and a delightful pool, creating a relaxed and picturesque atmosphere.

5. Indian River Lagoon, Florida

With the most biodiverse lagoon ecosystem in the northern hemisphere (it has more than 3,000 species of flora and fauna), it’s no surprise that the Indian River Lagoon is home to bioluminescent plankton. But, as a bonus, it also has bioluminescent comb jellyfish.

Where to Stay Nearby: Jupiter Beach Resort & Spa

Jupiter Beach Resort & Spa is a casual beachfront hotel ideal for families and couples with a relaxed atmosphere with a pool area featuring live music, a fire pit, and a swim-up bar. Featured amenities include a fitness center, poolside bar and restaurant, and free bicycle rentals. Entertainment includes poolside movies and live music on weekends.

6. Halong Bay, Vietnam

This UNESCO World Heritage Site is often cited for its nearly 2,000 towering limestone pillars and is usually filled with tourists on boats, taking in the views. But at night, it glows—if you’re far away enough from distracting lights.

Where to Stay Nearby: Vinpearl Resort & Spa Ha Long

Immerse yourself in luxury with a stay at the Vinpearl Resort and Spa. This 5-star resort on a private island offers breathtaking views, upscale amenities, and relaxation options galore. Unwind on private beaches, pamper yourself at the spa, or take a dip in the pool. Explore the surrounding wonders of Ha Long Bay or simply relax on your private balcony.

7. Mission Bay, San Diego

Bioluminescence on the shores of Black's Beach, San Diego County

This body of water off San Diego, too, experiences a red tide every few years, producing the same glow found around the world. The phenomenon occurs along the entire California coast, from Mission Bay to Tomales Bay and sometimes beyond. More often than not, California’s red tides are not harmful to humans.

Where to Stay Nearby: Omni La Costa Resort and Spa

This 400-acre property boasts extensive activities like fitness classes, tennis clinics, and a kid’s club. Relax by one of the six pools, unwind at the spa, or tee off at the championship golf course. Spacious rooms feature flat-screen TVs and iPod docks, with some offering soaking tubs and fireplaces. While all-inclusive in feel, the resort charges extra for activities like tennis and spa treatments.