That’s not sargassum on a Nayarit beach, but Hypnea, a safer lookalike

What looked similar an unprecedented sargassum penetration connected a fashionable formation successful the occidental authorities of Nayarit has alternatively been identified arsenic a harmless Pacific macroalgae — not the aforesaid seaweed that has go the scourge of Quintana Roo’s Caribbean shores.

For the past mates of weeks, beachgoers and residents successful Rincón de Guayabitos person observed clumps of brownish muck covering the shoreline. 

An particularly ample accumulation Sunday greeting led to Facebook and different societal media posts, including by the municipal authorities of Compostela which the Guayabitos formation is portion of, describing a “sargazo” invasion.

“This has ne'er happened before,” residents and boatmen told the paper La Jornada arsenic they joined cleanup efforts.

But researchers from the Autonomous University of Nayarit (UAN) said the worldly is not sargassum — which typically affects Mexico’s Caribbean coast — but Hypnea, a people occurring macroalgae.

In an interrogation connected Radio UAN, marine researchers Ubisha Hernández Almeida and María Alcántara said the accumulation is tied to seasonal changes successful water currents, h2o somesthesia and nutrient loads.

Unlike Atlantic sargassum — which tin origin respiratory irritations and tegument rashes arsenic it decomposes — Hypnea is not linked to ample transoceanic blooms and does not airs wellness risks, though it tin beryllium considered an unsightly nuisance and nutrient odors arsenic it decomposes.

The favoritism is significant.

Sargassum influxes person battered Quintana Roo for years, and the 2026 play remains severe. State officials study 79,476 tonnes collected arsenic of July 6, with Playa del Carmen and Cancún accounting for astir 60% of the total. 

Extensive containment and cleanup operations are ongoing on the Caribbean coast.

In contrast, Pacific seashore events specified arsenic the 1 successful Guayabitos are typically localized and temporary. Residents said smaller arrivals person occurred before, including successful 2021, but not astatine this scale.

“From 1 time to the next, the sargassum invaded … it had ne'er arrived successful specified quantities before,” a vendor told La Jornada, reflecting wide disorder implicit the phenomenon.

It is besides not a “red tide,” the toxic microscopic algal blooms that periodically discolor the h2o and punctual shellfish warnings successful places specified arsenic Zihuatanejo Bay. Instead of a harmful bloom of single-celled microalgae, Guayabitos is seeing mats of larger, multicellular seaweed that are unsightly and smelly erstwhile they heap up, but truthful acold person not triggered wellness advisories.

Local authorities and volunteers person launched cleanup campaigns, portion tourism operators explicit assurance that the lawsuit volition beryllium short-lived and acold little disruptive than sargassum blooms battering the Yucatán Peninsula.

With reports from La Jornada and 24 Horas Quintana Roo