Introduction
While aquaculture production is expanding globally, EU aquaculture output remains relatively stagnant and continues to cover only a limited share of domestic seafood demand (HUNTINGTON and CAPPELL 2026). At the same time, policy priorities increasingly emphasize diversification, particularly through low-trophic species and more resource-efficient production systems. However, this transition remains slow. We argue that this reflects a "diversification paradox": while policy ambition promotes diversification and sustainability, existing governance and permitting systems continue to favour established single-species production models (Chan, Cai et al. 2024, Lester, Gentry et al. 2024).
Materials and Methods
This contribution adopts a policy analysis perspective, examining how EU-level frameworks and their national implementation shape investment conditions in aquaculture. The analysis focuses on key regulatory domains affecting site development, environmental compliance, and market access, and explores how their interaction influences the feasibility of diversified production systems.
Results
The analysis reveals a severe structural mismatch: diversified, circular systems face significantly higher compliance burdens than traditional monocultures. A licensing architecture designed primarily for single species and linear outputs forces multi-species systems to undergo multiple parallel approvals. It also consistently treats valorised side-streams as regulatory "orphans" and introduces inconsistent interpretations across different jurisdictions (Alexander, Potts et al. 2015, Camarena-G��mez, L��hteenm��ki-Uutela et al. 2022). Empirical data indicates that this administrative complexity is worsening rather than improving, contributing to a 33% decline in new aquaculture licences and uneven processing times across Member States. Ultimately, these fragmented permitting structures increase investment risk and transaction costs, thereby locking the industry into established monoculture models that align more easily with existing regulatory pathways (Dixit and Pindyck 1994).
Discussion
EU aquaculture policy is currently advancing in ambition but failing in deployability, resulting in governance systems' coherence limitations (Huntington 2025). In order to overcome this structural bias, we need to go beyond calls for more innovation and implement "diversification ready" regulations to actively align benefits with circular ends; we need to improve policy coherence and reduce the degree of administrative uncertainty as essential conditions necessary for enabling the development of a more sustainable and resilient European aquaculture.
References
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Dixit, A. K. and R. S. Pindyck (1994). Investment under uncertainty, Princeton university press.
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HUNTINGTON, T. and R. CAPPELL (2026). Assessing the impact of seafood imports on EU self-sufficiency. European Parliament, Policy Department for Regional Development, Agriculture and Fisheries. R. F. P. COMMITTEE. Brussels, European Parliament's Committee on Fisheries.
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