Full Breakdown
Sabah Implements Strict Measures Following Koi Herpesvirus Outbreak
4/7/2026, 5:33:22 AM
Overview of the Koi Herpesvirus Outbreak
The Sabah state government has initiated comprehensive measures in response to a Koi Herpesvirus (KHV) outbreak that has led to significant mortality among freshwater fish, particularly the pelian species, since August 1, 2025. The outbreak has been confirmed in several major rivers across the districts of Keningau, Tambunan, Tenom, Penampang, Tuaran, Ranau, and Sipitang. The KHV is recognized as a high-impact aquaculture disease, with mortality rates ranging from 80% to 100% among infected fish.
Immediate Actions Taken
In light of the outbreak, State Agriculture, Fisheries and Food Industry Minister Jamawi Jaafar announced the immediate capture and destruction of all koi fish and other non-native Cyprinidae species from tagal areas, fish farms, and rivers throughout Sabah. The minister emphasized that these actions are necessary to prevent further infections among local fish populations. The government has also imposed a temporary ban on the import and export of all Cyprinidae species, which includes live fish, fry, broodstock, and any biological transfers that could facilitate the spread of KHV.
Causes of the Outbreak
Field investigations have identified the uncontrolled release of foreign fish species, particularly koi, as the primary cause of the KHV outbreak. This practice has been deemed irresponsible and a violation of biosecurity principles, leading to severe infections among native species. The ongoing dry season has exacerbated the situation by increasing water temperatures, which create favorable conditions for the virus.
Official Statements & Responses
Minister Jamawi Jaafar stated, “The fish must be destroyed immediately according to the biosecurity disposal standard operating procedure, and any form of release is strictly prohibited.” He further warned that those who violate the import/export ban or fail to comply with destruction orders will face strict legal action. Additionally, he urged aquaculture operators, ornamental fish breeders, and the public to adhere to biosecurity requirements and refrain from introducing foreign species into public waters.
Criticism & Opposition
While the government has taken decisive action, there may be concerns regarding the impact of these measures on local aquaculture businesses and ornamental fish breeders. Critics may argue that the immediate destruction of fish could have economic repercussions for those reliant on the aquaculture industry.
What's Next
The Sabah government plans to conduct a full biosecurity risk assessment to evaluate the situation further and determine long-term strategies to protect local aquatic biodiversity. The enforcement of the ban and destruction orders will be closely monitored to ensure compliance and mitigate the risk of future outbreaks.
