Thousands of dead fish appeared on a beach in Arica, Chile on January 25. Authorities investigating the mass die-off suspect hypoxia, or low levels of oxygen in the water.

Arica, a port city in northern Chile, is part of the Atacama Desert, the driest non-polar desert in the world. According to Geographical.co.uk, Arica gets only around 0.76 mm of rainfall per year ...