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Mosquito Bay

Night snorkel · Bioluminescent bay

A UNESCO World Heritage Site and the brightest bioluminescent bay in the world — light-emitting plankton turn the water a glowing blue after dark.

Scuba diver surrounded by glowing blue bioluminescent plankton in Mosquito Bay, Vieques
Diving the glowing water

About this site

Mosquito Bay is a UNESCO World Heritage Site and is certified as the brightest bioluminescent body of water in the world. After dark, the bay fills with light-emitting plankton that glow a brilliant electric blue whenever the water is disturbed — every stroke of a paddle or sweep of a hand leaves a trail of light. It is a night snorkel rather than a scuba dive, and an unforgettable way to end a day of diving.

Marine life spotted here

  • Bioluminescent plankton (dinoflagellates)
  • Mangrove ecosystem
  • Nocturnal marine life

Site Details

Destination
Puerto Rico · Culebra & Vieques
Dive type
Night snorkel · Bioluminescent bay
Max depth
Snorkel / night
Level
All levels

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