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Invasive black mussel threatens Lanka’s fragile wetlands

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A map showing the distribution of black mussel across the globe. Image by Mongabay courtesy of Jayachandran et al. (2019).

The discovery of the invasive black mussel (Mytella strigata) in shrimp farms along Sri Lanka’s northwestern coast has alarmed scientists, who warn that the species could spread rapidly and disrupt the country’s aquatic ecosystems, said a report published yesterday by the Mongabay.

Clusters of the mussel were first detected in September 2023 during surveys for a mangrove restoration project near the Anawilundawa Sanctuary, a Ramsar-listed wetland. Researcher Thilina Kumarasiri initially found empty shells in supply canals, which were later confirmed by conservationist Malik Fernando of the Wildlife & Nature Protection Society as belonging to M. strigata.

Originally from the Americas, the species has become a notorious invader in Asia, including India’s Kerala backwaters, and is known to foul aquaculture systems, clog fishing nets and reduce oyster settlement. Its rapid growth was evident in Anawilundawa, where drained ponds revealed thick mats of mussels attached to pond bottoms and hard surfaces within months.

“The speed at which this species spread in the pond was alarming,” Fernando said. “It suggests the mussel could establish itself quickly in similar habitats.”

According to Wayamba University’s aquaculture expert Prof. Sevvandi Jayakody, the mussel’s resilience lies in its biology: early maturity, long spawning seasons and tolerance to wide salinity and temperature ranges. She warned that its spread through Anawilundawa’s waterways could threaten sensitive wetland ecosystems if unchecked.

Scientists suspect the mussel may have arrived via contaminated live shrimp feed, ballast water from ships or biofouling on hulls. Sri Lanka, though part of the IMO’s biofouling management initiative, has yet to ratify the Ballast Water Management Convention.

Experts are calling for urgent monitoring, containment and stronger invasive species laws. “Rapid eradication is essential,” Jayakody said. “Without swift action and public awareness, this invader could become another costly ecological burden.”

Samantha Gunasekara, Chairperson of the Marine Environment Protection Authority in Sri Lanka, explained that ballast water — seawater taken on by ships for stability — is often loaded in one port and discharged in another, unintentionally transporting marine life across oceans.

Biofouling, the buildup of organisms such as barnacles, mussels and algae on submerged surfaces like hulls and propellers, is another vector. “Unlike ballast water, which can be treated, biofouling organisms can be physically stubborn and harder to remove,” Gunasekara noted.

Sri Lanka is one of 12 countries in the International Maritime Organisation (IMO)-led GloFouling Partnerships project, which promotes good biofouling management practices. “Even though the project ended in May 2025, we continue to support partner countries with pilot projects and sustainable technologies,” IMO technical analyst Will Griffiths said.

Many biofouling species can survive extended journeys, even across different water temperatures and salinities, so the project spurred the development of good practices and standards for improved biofouling management, Griffiths said.



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Wednesdays declared a government holiday with effect from 18th March

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The Commissioner General of Essential Services, Prabath Chandrakeerthi has announced that, after taking into consideration the current fuel situation in Sri Lanka, the  Government has decided to declare Wednesdays of every week as a holiday for government sector employees, all government schools, universities, and courts with effect from March 18, 2026,  until further notice

The holiday will not apply to essential service sectors including Healthcare, Ports, Water Supply and Customs.

 

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PM declares open Angunukolapelessa Leisure Island

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Prime Minister Dr. Harini Amarasuriya stated that leisure had long been limited to only a privileged segment of society, and that the government’s objective is to create opportunities for all citizens to equally experience and enjoy that leisure.

The Prime Minister made these remarks on  Sunday (15th of March) while opening the multi-purpose development project associated with the Angunakolapelessa Tank, developed under the “Pohosath Gamak” programme of the Ministry of Rural Development, Social Security and Community Empowerment for the public.

In parallel with the multi-purpose development project carried out associating the Angunakolapelessa Leisure Island, a boating facility and the Leisure Island cafeteria were also officially opened.

Addressing the gathering the Prime Minister  stated:

“The multi-purpose development project associated with the Angunakolapelessa Tank has received voluntary support from the community of  more than 700 days.

With the funding from the Ministry of Rural Development, Social Security and Community Empowerment, the Angunakolapelessa Pradeshiya Sabha, together with the divisional councils, public safety committees, youth societies, trade associations, and many others in the community, was able to transform this site into a major development project within a remarkably short period of time.

This project serves as a powerful example of what can be achieved when people unite collectively for a noble purpose. Developing a country is not a task that the government alone can accomplish.

When intellectuals, religious leaders, youth, entrepreneurs, and the public come together with strong and responsible leadership, we can build a nation so resilient that no hostile force will be able to weaken it.

People in rural communities who live demanding and hardworking lives also deserve to enjoy. For a long time,  leisure was limited to only a privileged segment of society. As a government committed to fostering a dignified cultural life for all citizens, it is important to create more spaces like this where people can relax, walk, enjoy themselves, and spend time with peace of mind.

The occasion was graced by the presence of the members of the Maha Sangha, and attended by the Minister of Rural Development, Social Security and Community Empowerment Upali Pannilage, other ministers and parliamentarians, government officials, and local residents.


(Prime Minister’s Media Division)

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Navy’s successful high-seas bust nets over 133kg haul of heroin

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As a key frontline stakeholder in the national mission, ‘A Nation United,’ the Navy continues to conduct maritime operations in the waters surrounding the island, in coordination with other law enforcement agencies.

During a recent successful operation on the high seas south of Sri Lanka, the Navy intercepted a local multi-day fishing trawler and apprehended five suspects (05) in connection with the smuggling of a stock of suspected drugs.

During a special inspection at the Dickowita fisheries harbour today (16 Mar26), the Police Narcotic Bureau (PNB) confirmed the presence of over one hundred and thirty-three (133)
kilograms of heroin.

The Deputy Minister of Defence, Major General Aruna Jayasekara (Retd), accompanied by the Commander of the Navy, Vice Admiral Kanchana Banagoda, was present in Dickowita to inspect the seized items.

Addressing the media, the Deputy Minister stated that the tri-forces, particularly the Navy, along with the Coast Guard, Police, and other law enforcement agencies, are executing the
government’s vision for national security. He noted that the recent naval operation in the southern seas, which seized a large consignment of narcotics and weapons, demonstrates the government’s success in combating criminal networks involved in narcotics, arms and human trafficking.

He added that such successful outcomes result from the Navy’s meticulous planning, surveillance, intelligence analysis, and inter-agency coordination. He affirmed that no leniency will be shown to drug trafficking networks, and conveyed admiration, on behalf of the President, for the distinctive contribution made by the Sri Lanka Navy, in collaboration with other stakeholders,
towards ensuring public safety and protecting the younger generation from the menace of drugs.

Highlighting the scale of the Navy’s impact, he revealed that naval operations in 2025 seized narcotics valued over Rs. 75 billion, and operations so far in 2026 have seized over Rs. 20 billion worth of drugs.

The Deputy Minister warned that traffickers are increasingly using the guise of legitimate fishing activities to smuggle narcotics. Besides, he emphasized that the responsibility lies not only with law enforcement agencies but with all sectors of society to eradicate the networks associated with drug trafficking. He issued a firm directive to traffickers, dealers, and distributors to “quit,” asserting that there is no loophole, whether by sea or air, that the security forces cannot close. He
further urged drug users to abandon this destructive habit.

He announced plans for legal amendments to impose stricter penalties for drug offenses. Noting that law enforcement agencies have operational autonomy, he appealed to the public to report information on drug trafficking to hotlines 1818 and 1997.

He also commended the media for their responsible reporting in educating the public on the drug menace.

The trawler, the suspects, the communication equipment and the stock of narcotics held in this operation were handed over to the PNB for onward investigation and legal proceedings.

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