THAILAND'S INVASIVE SPECIES LEGAL GAP: A CASE STUDY OF THE BLACKCHIN TILAPIA (SAROTHERODON MELANOTHERON)

Authors

DOI:

https://doi.org/10.18623/rvd.v23.6071

Keywords:

Aquatic Animals, Biosecurity, Legal Framework, Precautionary Principle, Thailand

Abstract

Thailand has struggled to control invasive alien species (IAS), which are among the top five most critical drivers of global biodiversity loss. Despite being a vital biodiversity hotspot, Thailand lacks a specific law on IAS, leading to numerous ecological and economic crises. In an effort to examine this problem, the authors undertook a qualitative documentary research approach, combining doctrinal analysis of the law and a case study of Thailand’s Blackchin Tilapia (Sarotherodon melanotheron) outbreak. A comparative legal analysis was conducted to compare the legislative frameworks of Thailand and Japan. The analysis disclosed three connected structural faults. These included (1) the ‘blacklist’ (prohibited list) system makes the importation of any species not yet formally regulated possible, an act that opposes the Precautionary Principle; (2) institutional authority is weak in the customs, fisheries, and livestock agencies because of institutional fragmentation, resulting in enforcement gaps; and (3) the statutory definition of ‘pollution’ does not extend to biological invasions, restricting the provisions for strict liability on IAS damages. However, Japan's UAS (Uncategorized Alien Species) system offers a superior proactive model. This article provides a critical legal perspective on Thailand's IAS Unique Contribution, offering practical ideas for legislative amendments, with specific processes and suggestions.

References

Alien Species. (2024). Nature & Parks. Ministry of the Environment, Japan. https://shorturl.at/2hCln

Ban announced on keeping invasive cichlid fish. (2018, March 22). Bangkok Post. https://shorturl.at/0fbJH

Boonrueang, S. (2020). A Legal Proposal for the Creation of Conservation Agreements in Thailand: A Comparative Study (Doctoral dissertation, University of Dundee). United Kingdom.

Chaianunporn, T., Panthum, T., Singchat, W., Chaianunporn, K., Suksavate, W., Chaiyes, A., … Srikulnath, K. (2024). Sustainable ecosystem management strategies for tackling the invasion of blackchin tilapia (Sarotherodon melanotheron) in Thailand: Guidelines and considerations. Animals, 14(22), 3292. https://doi.org/10.3390/ani14223292

Cherkaoui, L. K. (2025). Cumulative Environmental Impacts in Thailand: A Legal Appraisal of the EIA Regime under NEQA. Chulalongkorn University Theses and Dissertations (Chula ETD). 74872. https://doi.org/10.58837/CHULA.IS.2025.1

Cowan, C. (2025, January 16). Thai farmers demand action to restore ecosystems and compensate for invasive fish. https://shorturl.at/AVvX3

Enhancement and Conservation of National Environmental Quality Act, B.E. 2535 (1992). https://shorturl.at/yq75n

Hutasingh, O. (2024, February 3). Fisheries chiefs spell out the end for 'foreign' Tilapia. Bangkok Post. https://www.bangkokpost.com/thailand/general/2735369/fisheries-chiefs-spell-out-the-end-for-foreign-tilapia

Hutchinson, T., & Duncan, N. (2012). Defining and describing what we do: Doctrinal legal research. Deakin Law Review, 17(1), 83-119. https://doi.org/10.21153/dlr2012vol17no1art70

Janpakdee, U. (2024). Alien species: Benefits and impacts on biodiversity. Office of Natural Resources and Environmental Policy and Planning. https://www.onep.go.th/wp-content/uploads/2024/11/NE2024_10.pdf

Katayama, N. (2025). Biodiversity-related content currently taught in upper secondary biology in Japan: Endangered species and invasive alien species in basic biology textbooks. The Asian Journal of Biology Education, 17, 96-126. https://doi.org/10.57443/ajbe.17.0_96

Mito, T., & Uesugi, T. (2004). Invasive alien species in Japan: The status quo and the new regulation for prevention of their adverse effects. Global Environmental Research, 8(2), 171-193. https://doi.org/10.57466/ger.8.2_171

Mizutani, T., & Goka, K. (2010). Japan's Invasive Alien Species Act. Applied Entomology and Zoology, 45(1), 65-69. https://doi.org/10.1303/aez.2010.65

Mungkarndee, R., & Nantananate, D. (2023). Thailand's developments in promoting biodiversity: 2023 updates. https://shorturl.at/MyGgq

Munprasit, R., & Nootmorn, P. (2021). Establishment and operation of a regional system of fisheries refugia in the South China Sea and Gulf of Thailand: National reviews on reforms of national legislation for responsible fisheries relating to fisheries refugia: Thailand. Southeast Asian Fisheries Development Center. http://hdl.handle.net/20.500.12067/1771

Nakamura, J. N., & Amador, T. (2022). Legal report on the ecosystem approach to fisheries in Thailand: An analysis of the ecosystem approach to fisheries in selected national policies and legislation of Thailand (Vol. 45). FAO.

Nootmorn, P. (2020). Regulation and fisheries management for fisheries refugia in Thailand. SEAFDEC/Training Department. http://hdl.handle.net/20.500.12067/1702

Okorondu, J., Umar, N. A., Ulor, C. O., Onwuagba, C. G., Diagi, B. E., Ajiere, S. I., & Nwaogu, C. (2022). Anthropogenic activities as primary drivers of environmental pollution and loss of biodiversity: A review. International Journal of Trend in Scientific Research and Development, 6(4), 621-643. https://shorturl.at/fCrSJ

Royal Ordinance on Fisheries B.E. 2558 (A.D. 2015) and Royal Ordinance on Fisheries (No.2) B.E. 2560 (A.D. 2017). (2017). Royal Thai Government Gazette. https://www4.fisheries.go.th/article_pic/12620770.pdf

Sampantamit, T., Ho, L., Lachat, C., Sutummawong, N., Sorgeloos, P., & Goethals, P. (2020). Aquaculture production and its environmental sustainability in Thailand: Challenges and potential solutions. Sustainability, 12(5), 2010. https://doi.org/10.3390/su12052010

Slišković, M., Božić, K., Žanić Mikuličić, J., & Kolanović, I. (2024). Addressing the significance of the Union List with a focus on marine invasive alien species impacts. Sustainability, 16(21), 9435. https://doi.org/10.3390/su16219435

Supongpan, D. M., & Peakaue, M. A. (2016). A conference for fisheries knowledge provision to local fishers and private sectors in the Gulf of Thailand. Southeast Asian Fisheries Development Center. http://hdl.handle.net/20.500.12067/1150

Takahashi, M. A. (2006). A comparison of legal policy against alien species in New Zealand, the United States, and Japan: Can a better regulatory system be developed? In Assessment and control of biological invasion risks (pp. 45-55). Shoukadoh Book Sellers and IUCN. https://shorturl.at/IMJB5

The National Biodiversity Fund (NBC) has approved the draft Biodiversity Act. (2025, December 1). The Bangkok Insight. https://today.line.me/th/v3/article/3NyLnaZ

Wheeler, S. M., & Beatley, T. (Eds.). (2022). Sustainable urban development reader (5th ed.). Routledge. https://doi.org/10.4324/9781003288718

Xiao, L., Pagani-Núñez, E., Han, X., Zhao, P., Li, X., Hong, Y., ... & Lu, Z. (2024). A mixed black and whitelist approach for wildlife trade regulation in China: Biodiversity conservation is made of shades of gray. Conservation Science and Practice, 6(2), e13062. https://doi.org/10.1111/csp2.13062

Downloads

Published

2026-05-22

How to Cite

Phuput, P., Weeraphan, P., & Seehawattana, A. (2026). THAILAND’S INVASIVE SPECIES LEGAL GAP: A CASE STUDY OF THE BLACKCHIN TILAPIA (SAROTHERODON MELANOTHERON). Veredas Do Direito, 23(8), e236071. https://doi.org/10.18623/rvd.v23.6071