Hawaiian themed t shirts capture the vibrant energy of island life and the magic of the ocean—including one of nature’s most breathtaking wonders: the glowing sea at night. If you’ve only heard about this phenomenon, you might think it’s just a myth. However, thanks to the presence of certain plankton species that interact and create special chemical reactions, some beaches and bays around the world have shimmering, sparkling waters after dark. This enchanting glow is caused by a natural process called bioluminescence, turning the ocean into a scene straight out of a dream.
Bioluminescence is light produced by a chemical reaction within a living organism. Bioluminescence is a type of chemiluminescence, which is simply the term for a chemical reaction in which light is produced. (Bioluminescence is chemical luminescence that occurs within a living organism.) Bioluminescence is a “cold light.” Many beaches have phytoplankton, a form of microscopic algae that floats on the surface of the water, producing a fluorescent green color that glows at night.

1. Okayama Beach, Japan
At night, the rocks on Okayama Beach shimmer with an ethereal blue light, creating a scene that feels almost otherworldly. This stunning glow comes from tiny bioluminescent creatures known as “umihotaru” in Japanese—or scientifically, Vargula hilgendorfii. Though often called “sea fireflies,” these are actually small shrimps only about 3 millimeters long.
It’s exactly this kind of natural wonder that inspires the artistry behind Hawaiian-Themed T-Shirts. Each shirt is a celebration of the world’s most breathtaking natural phenomena, from glowing coastlines in Japan to golden sunsets in Hawaii. The vivid colors, oceanic patterns, and tropical motifs aren’t just designs; they are tributes to nature’s rare beauty and its ability to connect people to the sea, no matter where they are.
2. The beach is located in Toyama Bay, Japan
Located northwest of Tokyo, Toyama Bay offers visitors the world’s best nighttime viewing experience. The lights here are caused by firefly squid that live in this sea area. At night, when they surface to find a mate, they create a strong light, enough to make the sea shimmer and romantic.
Every year, firefly squid often appear in large numbers in Toyama from March to June, which is also the best time to see the glowing sea at night. Tourists can travel by cruise ship to see the sea at night. Then return and enjoy dishes made from the firefly squids that fishermen caught at night.
3. Hermosa Beach, California, USA
You can see bioluminescent waves at Hermosa Beach in California, where a microscopic single-celled algae called lingulodinium polyhedra produces blue light using luciferin (a light-emitting molecule).

4. Matsu Islands, Taiwan
Matsu is known for its “blue tears” phenomenon. When night falls, the bioluminescent algae transform the sea into a magical scene with blue streaks of light surrounding the rocks and troughs of the waves.
Although it is impossible to predict exactly when the bioluminescent algae will appear in Matsu, studies have shown that this algae will disappear at temperatures above 27 degrees Celsius. Therefore, before starting the journey, visitors can refer to the weather to have a satisfactory trip.
5. Yellow Sea, Dalian, Liaoning, China
The beach in Dalian glows at night with a shimmering blue light. According to experts, the light is emitted by a type of plankton called flagellates when there are certain changes in the environment. With strong tidal activity, the blue area becomes brighter.
6. Koh Rong, Cambodia
Cambodia’s Koh Rong Island is also an ideal place to watch the sea glow at night. Koh Rong is known as the most famous and attractive island in Cambodia. This place offers visitors peace with pristine scenery, long beaches, and clear water.
In addition, at night, when the plankton appear, the sea surface will become shimmering with magical blue light. A small tip for visitors here is that the light in the wild areas, far from the resort, will be more beautiful and attractive. Visitors can choose boat trips to see the sea at night or simply swim among the glowing plankton in the middle of the sea.
7. Jervis Bay, Australia
Jervis Bay in Australia is renowned for its white sand, crystal-clear waters, and whale watching. But the beautiful neon blue waves in the dark are also a sight to behold. The magical blue glow on each wave is created by plankton.
8. Coles Bay, Australia
Coles Bay, located on the island of Tasmania, south of Australia, is part of Freycinet National Park and is one of the most beautiful beaches on the island. Not only is the scenery attractive, but Coles Bay is even more special when the sea surface glows every night.
Since this is still a pristine area, visitors to Coles Bay can see the glowing sea all year round. In addition, if you travel to Coles in winter, visitors also have the opportunity to see the glowing sea at night and see the colorful aurora borealis in the same trip.
9. Mattu Beach, Udupi, Karnataka, India
Located 10 km from Udupi, Mattu Beach is a secluded spot known for its bioluminescence. The bioluminescence is caused by a microorganism called Noctiluca. This marine dinoflagellate emits a blue light when disturbed.
10. Mosquito Bay, Puerto Rico
Mosquito Beach, located on the small island of Vieques in Puerto Rico, is recognized by Guinness as the world’s brightest beach that glows at night. Every night, millions of plankton are active and glow brightly beneath the surface of the sea.
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Conclusion
As 2025 unfolds, these 10 breathtaking beaches remind us that paradise isn’t a fantasy; it’s a plane ticket away. Whether you’re drawn to the turquoise waters of Bora Bora or the wild beauty of Seychelles, each destination offers its own slice of heaven. So pack your sunscreen, charge your camera, and let the ocean guide your next great adventure. Getlatests invites you to chase the sun, feel the sand beneath your feet, and collect moments that will last a lifetime.


