Dinoflagellates are a type of single-celled algae, and each of these tiny creatures emits a small amount of light. There are so many dinoflagellates in the sea that when they all light up at once, the ...

Three of them are in Puerto Rico. These places, called “bio bays,” glowing tiny microorganisms called dinoflagellates. When these tiny creatures are disturbed, they light up the water with a ...

View Full Profile. Learn about our Editorial Policies. Rather than the flexible, X-shaped chromosomes familiar to humans, dinoflagellates organize their genetic material in orderly blocks along rigid, ...