On the island of Vieques off the coast of Puerto Rico, Mosquito Bay’s dinoflagellates give off their bioluminescent (by-oh-loo-mih-NESS-ent) light from dusk until dawn. “In other parts of the world, bioluminescence is seasonal,” explains Sharon Grasso, a tour guide on Vieques.

Exploring Mosquito Bay in Vieques on a glass-bottom kayak tour is an unforgettable experience. This tour combines the excitement of kayaking with the experience of viewing the bioluminescent organisms in the water below while you paddle through the bioluminescent waters.

Discover the magic of Vieques bioluminescent bay with BioBay Tour! With our completely transparent kayaks, you'll experience an unforgettable adventure while enjoying this amazing natural phenomenon.

Abe's offers unmatched aquatic experiences in Vieques, Puerto Rico. Go snorkeling, kayak through the mangroves, and visit the biobay at night. Book online!

Watch the world’s brightest bioluminescent bay glow as you paddle a glass-bottomed kayak. Catch a ferry at the port outside the town of Ceiba to reach the quiet island of Vieques off the east coast of Puerto Rico. Vieques’ secluded mangrove bay is beautiful during the day but simply astonishing after sunset.

There are only five bio bays in the world, so it’s worth experiencing this unique phenomenon on your trip to Vieques! Bioluminescence is best seen on moonless nights, so plan your trip for the new moon lunar phase.

We offer bio bay kayak tours to the brightest bioluminescent bay in the world, snorkel tours, and custom Island excursions. Let us show you the magic Vieques has to offer top of page

Discover the unparalleled beauty of Vieques, Puerto Rico, with Mosquito Bio Bay Tours, your premier guide to unforgettable Caribbean adventures. From the dazzling glow of the world’s brightest bioluminescent bay to secluded snorkeling excursions, we combine excitement, relaxation, and the wonders of nature for an experience like no other.

BIOBAY TOUR $50 (NO FEES) Pay $10 now, and the rest of the balance in Vieques. BOOK NOW! If playback doesn't begin shortly, try restarting your device. Videos you watch may be added to the TV's watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer.

The Puerto Mosquito Bioluminescent Bay (Spanish: Bahía bioluminiscente de Puerto Mosquito), or Mosquito Bio Bay, is a bay in the island of Vieques famous for its bioluminescence produced by the dinoflagellate Pyrodinium bahamense, which glows blue when agitated.