Bioluminescent Bay Fajardo

Bioluminescent Bay Fajardo Puerto RicoLaguna Grande in Fajardo, PR

Bioluminescent Bay Laguna Grande in Las Croabas is a one of a kind ecosystem situated along the Puerto Rico’s northeastern city of Fajardo. It is the second best-kept bioluminescent bay in Puerto Rico after Mosquito Bay. Visiting bio bay is by far the most mystifying experience of the island. Bio bay of Laguna Grande was first spotted by the Spanish in the seventeenth century when they stumbled upon the “devil” glowing water reservoir. They made an effort to prevent the water from lagoon entering the ocean. Luckily, by shrinking the outflow from the bay, they aided in luminescence increase.

Rada Fajardo at dusk - starting point for Bioluminescent Bay in Laguna GrandeRada Fajardo at dusk – starting point for Bioluminescent Bay Tour in Laguna Grande

The uniqueness of bio bay waters consists in its oceanic residents which are able to light up in the dark. Bioluminescence is genuinely a special occurrence of fragile nature’s ecosystem. The luminescence happens all over the earth, yet only a handful of places are categorized as bio bays. Most of them are at high risk of vanishing because of extensive urban intervention and deficiency of ecological regulations. Fortunately, the bioluminescent bay in Fajardo, Puerto Rico is in good shape featuring great night scenery.

There are many strict requirements essential for the ecocommunity of luminescent microorganisms, named dinoflagellates, to remain alive and active. The mangrove trees surrounding bio bay supply various nutrients and minerals from roots and decomposed foliage. A narrow-sized canal connecting Laguna Grande bio bay with the ocean influences the microclimate and temperature within the lagoon. Any transformations of the canal causing it to be deeper, shallower, wider, etc may destroy a bioluminescent bay.

One more pernicious factor for Fajardo lagoon’s vitality is city-wide development linked to increasing levels of air, soil and water pollution. In an attempt to keep the vulnerable bio bay active and alive, DNER (the Department of Natural and Environmental Resources) of Puerto Rico prohibited swimming in the bioluminescent bay and enforced a limit of total number of people that could paddle into the bay on the daily basis. Book your Bio Bay Kayak Tours with Go Tours Puerto Rico for complete luxury and comfort.

Getting There:


User videos from the Bioluminescent Bay Fajardo:

Kayaking to the Laguna Grande Bioluminescent Bay in Fajardo

Bioluminescent Bay Kayak Adventure

More information about Fajardo, Puerto Rico and its Bioluminescent Lagoon.
Besides Bio Bay Fajardo, Puerto Rico has two more luminous bays in Vieques and Lajas.
Kayak and other tour operators in Fajardo, Puerto Rico

Other Sources
My Favorite Underwater Camera
I always use GoPro camera for capturing the most epic videos, whether it's riding waves, bikeing, kayaking or snorkeling (it comes with a free underwater case)

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Travel Guides

The following are my favorite travel guides about Puerto Rico. You can click on the images below to read more or to get a copy for your tablet: