GlossaryEN1 min readUpdated: Jun 26, 2026
Biofouling Management
Biofouling management covers all measures taken to prevent or reduce the accumulation of marine organisms – algae, mussels, barnacles, and others – on submerged ship surfaces such as hulls, propellers, rudders, and sea chests.
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Source: https://www.imo.org/en/OurWork/Environment/Pages/Biofouling.aspx
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Definition & Explanation
Biofouling management covers all measures taken to prevent or reduce the accumulation of marine organisms – algae, mussels, barnacles, and others – on submerged ship surfaces such as hulls, propellers, rudders, and sea chests. Unchecked fouling increases hydrodynamic drag, raising fuel consumption and emissions considerably. Common control strategies include antifouling hull coatings, in-water cleaning systems, and dry-dock treatment during scheduled maintenance periods. Beyond operational efficiency, the IMO's biofouling guidelines also address invasive species transfer: fouled vessels can introduce non-native organisms to new marine environments, causing lasting ecological damage. Shipowners, technical managers, and classification societies therefore treat biofouling management as both a cost-control measure and a compliance obligation.
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