Indonesia’s native freshwater fish could support food security and a low-emission economy, provided they are developed without harming their ecosystems.
KUALA LUMPUR — Wader and seluang, small freshwater fish long known as a humble everyday dish on Indonesian tables, were presented as a promising future food source at an international scientific forum. Professor Dr. Bambang Retnoaji, M.Sc., of the Faculty of Biology, Universitas Gadjah Mada (UGM), shared the idea as an invited speaker at the 6th International Conference on Biodiversity (ICB) in Kuala Lumpur, Malaysia, on Wednesday, 11 November 2026.
The conference is an international joint conference between the Faculty of Biology, UGM, and the Faculty of Applied Sciences and Technology, Universiti Tun Hussein Onn Malaysia (UTHM).
In his presentation, Prof. Bambang explained that native freshwater fish biodiversity can bridge conservation, food security and sustainable economic development. Wader and seluang, he said, have the potential to move beyond local consumption and become part of sustainable blue food systems, that is, food sourced from aquatic environments.
He cautioned, however, that developing these fish requires care. Species identity, ecological roles, nutritional characteristics, and the sustainability of harvesting and production practices must all be carefully considered so that wild populations remain healthy.
Prof. Bambang outlined several priorities: biodiversity characterization, habitat protection, domestication and breeding, resource-efficient aquaculture, and appropriate food processing. The common practice of eating small fish whole may also offer distinct nutritional benefits. Economically, improvements in product quality, food safety and market access could strengthen community-based enterprises.
In the context of a net-zero economy, wader and seluang offer opportunities to improve feed and energy efficiency, reduce post-harvest losses, make use of processing by-products and strengthen local value chains. Prof. Bambang stressed, however, that such environmental benefits must be demonstrated through life-cycle assessment rather than assumed simply because the fish are native or small.
“Wader and seluang show how Indonesia’s freshwater fish biodiversity can support nutritious food, resilient livelihoods and lower-emission food systems, without sacrificing ecological integrity,” said Prof. Bambang.
He called for an integrated approach linking biodiversity research, production innovation, environmental assessment and community participation.
The work aligns with several of the Sustainable Development Goals (SDGs), including SDG 2 (Zero Hunger), SDG 8 (Decent Work and Economic Growth), SDG 12 (Responsible Consumption and Production), SDG 13 (Climate Action) and SDG 15 (Life on Land, which covers inland freshwater ecosystems).





















































