The lake that will host rowing events at the Rio de Janiero 2016 Olympic Games is facing a huge cleanup after it was filled with 65 tonnes of dead fish.
The Rodrigo de Freitas Lagoon in Rio became deoxygenated after storms, leading to the deaths of thousands of a type of fish called shad.
Rio's municipal department of the environment said that since Monday 65 tons of dead fish have been removed from the lake. The lake located in the heart of the city is among the area's many tourist attractions.
The department says that a rain storm earlier this week washed organic matter into the lake, leading to the big die-off of the fish.
It says the situation is improving and that no dead fish were pulled out of the lake yesterday.