Massive dark patch appears in waters off Rio de Janeiro coast

STORY: :: A monolithic acheronian spot appears disconnected the Rio de Janeiro seashore adjacent Barra da Tijuca Beach

:: May 15, 2025

:: Reuters drone shots amusement brownish h2o lasting retired against the ocean’s blue

:: Rio de Janeiro, Brazil

:: A biologist told Reuters the acheronian spot is linked to municipality growth

:: Mario Moscatelli, Biologist

"What is this stain associated with? Urban growth, whether ordered oregon disordered, doesn't person cosmopolitan sanitation passim the region. In different words, the sewage flows down the rivers, into the lagoon and from the lagoon into the sea."

"Today you tin spot that the colour is greener. Why? Because it astir apt has cyanobacteria, which are a benignant of algae that multiply successful precise unhealthy conditions erstwhile you person a batch of sewage successful the lagoons."

The stain appeared connected Wednesday (May 14) disconnected the Barra da Tijuca Beach, successful occidental Rio.

Reuters drone shots amusement the h2o arsenic brownish, contrasting with the ocean's blue.

"The sewage flows down the rivers, into the lagoon, and from the lagoon into the sea," biologist Mario Moscatelli told Reuters.