Last month, beachgoers at Botafogo Beach in Rio de Janerio, Brazil received a pleasant addition to their beach experience.

As the 2012 Rio 20+ U.N. Conference on Sustainable Development was underway an artist (or perhaps a group, we don’t know) created large fish installations on the beach using discarded plastic water bottles.

Check out the impressive out in the photos below. (See more photos from Ascom Riotur’s Rio+20 album.)