By Agustín del Castillo The corals of the Marietas Islands, a pair of small islands in Mexico’s Pacific Ocean, have survived record-high temperatures and uncontrolled tourism triggered by the sudden international fame of “the beach of love,” a picture-perfect quarry where people like to take selfies. Today, the corals of Islas Marietas National Park, created in 2005, are recovering slowly, reduced to a fifth of the coverage they had 30 years ago. In 2016, a government decree put a stop to uncontrolled tourism in the area. But during the second half of 2023, El Niño set back the recovery proces…