El País

This is hyacinth, a perennial aquatic plant which is rapidly taking over Lake Victoria in Kenya. On one hand, the hyacinth is becoming a menace to the local fishermen and the lake's ecosystem, and on the other, it is adorning the water with its violet flowers creating the most breathtaking of sights. These plants might be a menace, but they are a beautiful menace nevertheless.

Images published on El País and The Guardian.