Thousands of Pink Jellyfish Seen in the Philippines as Tourists Desert Beaches Amid Coronavirus Crisis

Giant blooms of pink jellyfish have been reported in Palawan, Philippines, as beaches are left deserted during the coronavirus pandemic.

Sheldon Rey Boco, a PhD candidate in marine biology at Griffith University, Australia, shared a video he said was taken on March 23.

The Philippines' Department of Environment and Natural Resources (DENR) reshared the clip, which shows a seemingly endless congregation of Crambione cf. mastigophora, nicknamed "sea tomato," in Corong Corong Beach in El Nido, Palawan.

"These hundreds or thousands of medusae are probably present in late January or February but because of wind, current and tidal conditions, they only seem to appear during March in Palawan," said Boco, co-founder of the Philippine Jellyfish Stings Project, Manila Bulletin reported.

"The atmosphere, water velocity, current, tide and even geological features of the bay or any body of water can influence the occurrence of medusae and their blooms."

Boco added: "There are years when blooms or populations of a jellyfish are high and there are also years when they are few or even almost absent."

El Nido may be teeming with jellies but Benny Antiporda of the DENR told Business Mirror the blooms weren't exceptional.

Antiporda, who is the DENR undersecretary for Local Government Units (LGUs) and Solid Waste Management Concern, told the Philippines news outlet that the jellyfish bloom is a yearly occurrence.

"These jellyfish were brought by the ocean current and usually, they end up in Corong-Corong Bay," he said. He explained quarantines enforced in the area prevented locals from harvesting the animals, which in turn has allowed these jellyfish communities to thrive.

Pink jellyfish bloom
A photo of the jellyfish bloom in Palawan taken on April 1, 2020. Sue Muller Hacking

Dr. Ryan Baring, lecturer in marine biology at Flinders University, is less convinced that a COVID-19-related quiet spell is responsible for these blooms.

"It is difficult to tell without further experimental research, but unlikely to be a sole reason for the bloom," he told Newsweek. "It might just be with the situation in the Philippines, that the current bloom is more noticeable because the tourists aren't there to disturb the jellies and so they are rising all the way to the surface of the water and in the presence of tourists they may stay closer to the bottom of the sea, or move further offshore."

"On days when it is business-as-usual, the Corong-corong Bay in El Nido is heavily used by tourists for
recreational fishing and boating and by local fishers for catching fish and invertebrates," Boco told Newsweek. "These activities can possibly alter water circulation and distribution of zooplankton food for the jellyfish, thereby potentially changing the distribution of jellyfish medusae."

Boco said, "The absence of field data and formal scientific reports on the behavior and distribution of the jellyfish species makes it difficult to even speculate about whether the presence of tourists and fishers on the area affect the jellyfish."

While the blooms may look spectacular, they may be a problem for local fishers, Boco said.

"Fishing nets can be clogged by the jellyfish and even if they catch fish, the catch will probably be mixed with jellyfish mucus and tentacles, reducing the quality of the catch and making it almost impossible to sell in Palawan," Boco said.

Jellyfish may be uniquely placed to benefit from climate change as new habitats open up. According to the World Economic Forum, the animals flourish in waters with lower oxygen levels, while overfishing has reduced levels of other animals that either compete with jellyfish for food, such as anchovies, or eat jellyfish themselves, such as tuna.

Climate change may also boost jellyfish populations by allowing jelly embryos and larvae to develop faster, according to Smithsonian.

This could lead to more blooms like the one seen in El Nido or the one that hit Ireland in 2007, when mauve stinger jellyfish asphyxiated more than 100,000 farmed salmon, as reported at the time by The Telegraph.

Last month, Malaysia's national news agency Bernama revealed thousands of Crambione mastigophora had washed ashore Labuan beach on Labuan Island, near Borneo's northern tip.

In 1999, 50 truckloads of jellyfish were removed from the island Luzon in the Philippines after causing a power cut, BBC News reported at the time. According to authorities, the jellyfish had been sucked up into a power plant near the country's capital, Manila.

"The problem is we know very little about the ecology jellyfish, especially in Southeast Asia where there's a lot of difference species," said Dr. Mark Tupper, senior teaching fellow at the University of Portsmouth's School of Biological Sciences in the U.K. He told Newsweek these blooms can contain billions of jellyfish and stretch for dozens of miles. However, he is skeptical that these blooms have anything to do with a lack of tourists.

"We do know that jellyfish bloom or swarms are a fairly regular thing. In fact, they have been the target of actual fisheries for about 1500 years, or even more."

 Pink jellyfish
Stock image: Pink jellyfish. iStock
Thousands of Pink Jellyfish Seen in the Philippines as Tourists Desert Beaches Amid Coronavirus Crisis | Tech & Science