That’s not sargassum on a Nayarit beach, but Hypnea, a safer lookalike
What looked like an unprecedented sargassum invasion on a popular beach in the western state of Nayarit has instead been identified as a harmless Pacific macroalgae — not the same seaweed that has become the scourge of Quintana Roo’s Caribbean shores. For the past couple of weeks, beachgoers and residents in Rincón de Guayabitos have observed clumps of brown muck covering the shoreline. An especially large accumulation Sunday morning led to Facebook and other social media posts, including by the municipal government of Compostela which the Guayabitos beach is part of, describing a “ sargazo” invasion. “This has never happened before,” residents and boatmen told the newspaper La Jornada as they joined cleanup efforts. But researchers from the Autonomous University of Nayarit (UAN) said the material is not sargassum — which typically affects Mexico’s Caribbean coast — but Hypnea, a naturally occurring macroalgae. In an interview on Radio UAN, marine researchers Ubisha Hernánde...