Fluorescent blue cast in Brazilian waters stuns canoeing team

The bioluminescence phenomenon in Florianopolis, Brazil. Photo: SCC10

A fluorescent blue cast in Brazilian waters stunned a canoeing team on Wednesday (26) when rowers discovered an underwater glowing light in the sea of southern Florianopolis in Santa Catarina.

The bioluminescence phenomenon is caused by phytoplankton microalgae. The tiny cells flash when they’re disturbed by waves or currents and scientists believe it’s a self-protecting mechanism. The luminous light show used to take place during calm and warm water seasons, although climate change has altered its pattern.

Tatiana Cesso

As a journalist, I am dedicated to uncovering stories that inspire, inform, and captivate. My work has appeared in renowned publications such as InStyle, Marie Claire, Bazaar, L’Officiel, and Vogue. Though I have lived in the U.S. since 2010—calling Chicago, Los Angeles, and now Miami home—my heart remains deeply connected to Brazil, where I was born and raised. This enduring love for its culture and energy led me to create Brazilcore, a platform designed to connect Brazil with English-speaking audiences around the globe.