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Dead fish fill Rio lagoon

Christophe Simon / AFP - Getty Images

Tons of dead fish float on the waters of the Rodrigo de Freitas lagoon, beside the Corcovado mountain in Rio de Janeiro, Brazil on March 13, 2013.

Christophe Simon / AFP - Getty Images

Municipal workers collect dead fish floating on the waters of the Rodrigo de Freitas lagoon, beside the Corcovado mountain in Rio de Janeiro, Brazil on March 13, 2013.

A storm earlier this week washed organic matter into a lake in Rio de Janeiro, Brazil leading to the deaths of 12 tons of fish, reports the Montreal Gazette.