Black-bellied monkfish
Lophius budegassa
What to check for
Location
North Sea, Rockall and West of Scotland, Kattegat and Skagerrak
Technical location
Atlantic, Northeast, North Sea, Rockall, West of Scotland, Skagerrak and Kattegat
Caught by
Bottom trawl (otter)
Rating summary
Monkfish in the North Sea was benchmarked in 2024. Fishing pressure (F) is below FMSY and Spawning stock biomass (SSB) is above MSY Btrigger. Management of the stock is only partly effective. Management should be implemented at the stock level as currently the TAC does not match the stock area and there is potential for catches to exceed advice. Most monkfish are caught using otter trawls, these can interact with the seabed and modify bottom topography causing damage and removal of some biogenic features including vulnerable marine habitats and benthic communities. There may also be bycatch of vulnerable species.Rating last updated: January 2025
Technical consultation summary
Monkfish in the North Sea was benchmarked in 2024. Fishing pressure (F) is below FMSY and Spawning stock biomass (SSB) is above MSY Btrigger. Management of the stock is only partly effective. Management should be implemented at the stock level as currently the TAC does not match the stock area and there is potential for catches to exceed advice. Most monkfish are caught using otter trawls, these can interact with the seabed and modify bottom topography causing damage and removal of some biogenic features including vulnerable marine habitats and benthic communities. There may also be bycatch of vulnerable species.
How we worked out this Rating
Monkfish in the North Sea is not overfished or subject to overfishing.The stock advice provided by ICES covers two species of anglerfish, or monkfish – Lophius piscatorius (white anglerfish) and L. budegassaI (black-bellied anglerfish), which are usually caught and managed together. White anglerfish has a medium resilience to fishing pressure, while black-bellied anglerfish has a low resilience to fishing pressure. The former is thought to make up the majority of catches (> 93%).This stock was benchmarked in 2024. The latest stock assessment shows that spawning-stock biomass (53,377) has been increasing since 2018 and in 2024 is above MSY Btrigger (38,604 tonnes), Bpa (35, 692 tonnes) and Blim (25,686 tonnes).Fishing pressure (0.089) has declined and in 2023 was below FMSY (0.137).ICES advises that when the MSY approach is applied, catches in 2025 should be no more than 30,726 tonnes. This is a large change in advice following the benchmark of the stock.
Management of the stock is only partly effective. Management should be implemented at the stock level as currently the TAC does not match the stock area and there is potential for catches to exceed advice.The fisheries for the two anglerfish species are managed under Total Allowable Catches (TACs) for two areas, which do not match the stock area. The species are usually caught together and not separated in the landings statistics. Management of the two species in this way risks preventing effective control of the single-species exploitation rates and could possibly lead to overexploitation of either species.There are two European Community TACs in this area, but they do not match the stock unit and do not include Norwegian catches. One covers ICES areas 4 and 2a (North Sea and Norwegian Sea); the second covers 5b, 6, 12, and 14 (Faroes, West of Scotland, North of Azores, East Greenland). There is no TAC for Division 3a – landings in this area were 912 tonnes in 2021 (preliminary official landings) – the fourth highest on records, with all four of the highest occurring over the last four years, indicating this area of the fishery is developing. As a result of this mismatch, there is a potential for catches to exceed advice. TACs have historically been set higher than scientific advice, but TAC in 2017-2020 and 2022 were set in line with advice. TAC in 2021 (18,349 tonnes) was set just above advice (17,645 tonnes). When taking the additional quota for Norway into account (now 1,000 tonnes per year), TACs in the last 5 years (2018-22) averaged 106% of advice.In general, discarding in this fishery is relatively low due to high market value (average 2.9% 2007-2021). There is no Minimum Conservation Reference Size (MCRS) and therefore anglerfish may be fished before they have had the chance to reproduce. Overall discarding was 1.2% of the total catch in 2021, a decrease on previous years with 1.6% in 2020 and 2.3% in 2019.Because of its body shape and large head and jaw, the introduction of a MCRS has not been considered a useful or practical management measure. However, EU Council Regulation (No. 2406/96) laying down common marketing standards for certain fishery products, fixes a minimum weight of 500g for anglerfish. Other monkfish fisheries are due to develop harvest control rules to comply with certification schemes (Icelandic fleet, Marine Stewardship Council (MSC)), if these were implemented in the North Sea area it would enable improved management in this North Sea fishery.The EU and UK both have fishery management measures, which can include catch limits, population targets, and gear restrictions. However, compliance in the EU and UK has been inconsistent, with ongoing challenges in implementing some regulations. The goal of reaching Maximum Sustainable Yield (MSY) by 2020 was missed, with less than half of UK TACs in 2024 following ICES advice. In 2024, the EU and UK reaffirmed their commitment to sustainable fisheries by aligning management with scientific advice to gradually approach MSY. However, no new target date has been set for achieving MSY across all fisheries. The Landing Obligation (LO), an EU law retained by the UK post-Brexit, requires all quota fish to be landed, even if unwanted (over-quota or below minimum size). It aims to encourage more selective fishing methods, reduce bycatch, and improve catch reporting. However, compliance is poor, and accurate discard levels are hard to quantify with current monitoring programmes. The UK is in the process of replacing the LO with country-specific Catching Policies.The Marine Conservation Society views Remote Electronic Monitoring (REM) with cameras is one of the most cost-effective tools for providing reliable fisheries data and aiding informed management decisions. Fully monitored fisheries enhance collaboration, data accuracy, stock recovery, and reduce impacts on marine wildlife and habitats. However, the full potential of REM may only be achieved when it tracks fishing location and documents catch and bycatch, particularly where vulnerable species and habitats are at risk. As of January 2024, the EU is introducing a Remote Electronic Monitoring (REM) mandate for EU vessels, including CCTV cameras on vessels 18m or more that pose a potential risk of non-compliance, within the next 4 years. Across the UK, different approaches to REM are being taken and legislation is expected to be in place across all 4 countries within the next few years.The Fisheries Act (2020) requires the development of Fisheries Management Plans (FMPs) (replacing EU Multi-Annual Plans) in the UK. 43 FMPs have been proposed and are at various stages of development and implementation, these should all be published by the end of 2028. FMPs have the potential to be very important tools for managing UK fisheries, although data limitations may delay them for some stocks. It is also essential the UK governments define and adopt a standardised approach or model across the four nations to a universally defined FMP design, to ensure the consistence, quality and coherence of all the proposal FMPs.The Marine Conservation Society is keen to see publicly available Fishery Management Plans for all commercially exploited stocks, especially where stocks are depleted, that include:An overview of the fishery including current stock status, spatial coverage, current fishing methods and impactsTargets for fishing pressure and biomass, and additional management when those targets are not being met, based on the best scientific evidenceTimeframes for stock recoveryImproved data collection, transparency, and accountability, supported by technologies such as Remote Electronic Monitoring (REM)Consideration of wider environmental impacts of the fishery, including habitat impacts and minimising bycatch
Most monkfish are caught using otter trawls. These can interact with the seabed, causing damage and removal of some vulnerable marine habitats. There may also be bycatch of vulnerable species.Most monkfish in 2021 was caught by demersal trawls (68-87%). Between 1-21% of the catch was from gillnets with a small amount caught in lobster trawls (6-11%), with proportions depending on the area fished.Demersal trawls have contact with the seabed, resulting in penetration and abrasion of habitat features. The impact of trawling on the seabed depends on the where trawling happens, and on what scale. For example, habitats that are used to natural disturbance through tides and waves are less sensitive to impacts. Areas not used to mobile towed gears are typically more sensitive.Various closures are in place in the area of this stock, including UK and European Marine Protected Areas. Some MPAs are designated to protect benthic features. If those MPAs were found to be subjected to bottom trawling, MCS would consider it a default red rating unless there is evidence (e.g. environmental impact assessment) indicating the activity does not damage the integrity of the site. EU vessels are required to report significant catches of corals and sponges to assist mapping of VME communities, and must move fishing operations at least 2-miles when they are encountered.Demersal otter trawls have the potential to take relatively high quantities of bycatch, although reported rates are relatively low. In the Northeast Atlantic there are reported catches of demersal elasmobranchs and endangered, protected and threatened (ETP) species (e.g. sharks, rays and marine mammals). Bycatch data is limited in many UK and EU fisheries as they are generally not well monitored. Different mesh sizes are used depending on the primary target species in this area, ranging from 70-100mm. Mesh size restrictions in place do not sufficiently protect non-target species and discards are relatively high in demersal and benthic fisheries. The mixed nature of most of the bottom fisheries and the spatial and temporal heterogeneity of target species challenge the simultaneous achievement of individual stock maximum sustainable yield (MSY) objectives, as well as the limitation of unwanted catches.Eight species of elasmobranchs that occur in the Greater North Sea ecoregion are listed on OSPAR’s list of threatened and declining species. Some of these are rare (e.g. basking shark, common skate, starry ray, and angel shark) and seldom caught in fisheries. Marine mammals and birds are also rarely recorded in otter trawls.UK regulations to reduce the impacts of fishing on marine habitats and wider species are under development, in the meantime most EU regulations have been adopted. Under EU legislation, bycatch species should be managed within scientifically defined or, where data isn’t available, suitably precautionary sustainable exploitation limits. If stocks fall below trigger levels, measures can be brought in such as limits on characteristics or use of gear (e.g. mesh size, depth); time/area closures; and minimum conservation reference sizes. However, there is limited evidence to show how well ecosystem wide impacts, including bycatch, are currently being managed.A Fishery Improvement Project (FIP) was established for this fishery in 2022, with the first assessment against objectives due in 2023. The FIP aims to ensure that the fishery does not compromise stocks, recovery and conservation of other species caught as bycatch including: mackerel, squid, cod, common skate, starry ray and other endangered, threatened and protected (ETP) species. It also includes an objective to develop a strategy to ensure impacts on vulnerable marine ecosystems (VMEs) are at acceptable levels. It is too early to assess the progress of the FIP against objectives.There are Marine Protected Areas (MPAs) in this area, some of which are designated to protect seabed features from damaging activities. This fishery overlaps with parts of these MPAs, but the proportion of the catch coming from these areas is expected to be relatively low in relation to the unit of assessment (i.e. less than 20% of the catch or effort), and so these impacts have not been assessed within the scale of this rating. Given the important role that MPAs have in recovering the health and function of our seas, MCS encourages the supply chain to identify if their specific sources are being caught from within MPAs. If sources are suspected of coming from within designated and managed MPAs, MCS advises businesses to establish if the fishing activity is operating legally inside a designated and managed MPA, and request evidence from the fishery or managing authority to demonstrate that the activity is not damaging to protected features or a threat to the conservation objectives of the site(s).To improve monitoring and reporting of fishing activity, MCS would like to see remote electronic monitoring (REM) with cameras implemented, used and enforced.To reduce the impacts of fishing on the marine environment we would like to see a just transition to the complete removal of bottom towed gear from offshore Marine Protected Areas designated to protect the seabed. We also want to see reduction and mitigation of environmental impacts including emissions and blue carbon habitat damage.
References
Anderson, O.R.J., Thompson, D. & Parsons, M. 2022. Seabird bycatch mitigation: evidence base for possible UK application and research. JNCC Report No. 717, JNCC, Peterborough. ISSN 0963-8091. https://hub.jncc.gov.uk/assets/dbed3ea2-1c2a-40cf-b0f8-437372f1a036 [Accessed on 13.01.25]Dierschke, V. 2022. Pilot Assessment of Marine bird bycatch. In: OSPAR, 2023: The 2023 Quality Status Report for the North-East Atlantic. OSPAR Commission, London. Available at: https://oap-cloudfront.ospar.org/media/filer_public/f8/74/f87489df-01b5-4416-91da-3aa40f10a249/p00855_b7_marine_bird_bycatch_pilot_asssessment_qsr2023.pdf [Accessed on 13.1.25]EU, 2005. Council Regulation (EC) No 2406/96 of 26 November 1996 laying down common marketing standards for certain fishery products. Publications Office of the European Union. Available at: https://op.europa.eu/en/publication-detail/-/publication/9e7930c8-61f9-4f8e-8b65-ccbcfeea30d5 [Accessed on 12.1.25]Fishery Progress, 2022. UK North Sea and West Coast of Scotland monkfish - gillnet & trawl (SFSAG). Available at: https://fisheryprogress.org/fip-profile/uk-north-sea-and-west-coast-scotland-monkfish-gillnet-trawl-sfsag [Accessed on 10.1.25]Froese, R. and D. Pauly. Editors. 2022.FishBase. World Wide Web electronic publication.www.fishbase.org, Lophius piscatorius & Lophius budegessa (08/2022)Hønneland, G., Scarcella, G., Crespo, J. P., 2022. ISF Iceland anglerfish Surveillance Report. Marine Stewardship Council (MSC). Available at: https://fisheries.msc.org/en/fisheries/isf-iceland-anglerfish/@@assessments [Accessed on 12.1.25]ICES. 2024. Anglerfish (Lophius budegassa, Lophius piscatorius) in Subareas 4 and 6, and Division 3.a (North Sea, Rockall and West of Scotland, Skagerrak and Kattegat). In Report of the ICES Advisory Committee, 2024. ICES Advice 2024, anf.27.3a46. Available at https://doi.org/10.17895/ices.advice.25019156 [Accessed on 12.1.25].ICES. 2022a. Greater North Sea ecoregion – Ecosystem overview. In Report of the ICES Advisory Committee, 2022. ICES Advice 2022, Section 7.1, https://doi.org/10.17895/ices.advice.21731912ICES. 2022b. Greater North Sea ecoregion – fisheries overview In Report of the ICES Advisory Committee, 2022. ICES Advice 2022, section 9.2. https://doi.org/10.17895/ices.advice.21641360ICES. 2022c. Working Group on Bycatch of Protected Species (WGBYC). ICES Scientific Reports. 4:91. 265 pp. https://doi.org/10.17895/ices.pub.21602322JNCC, 2021. Seabird Monitoring Programme Report 1986–2019: Guillemot (Uria aalge). Available at https://jncc.gov.uk/our-work/guillemot-uria-aalge [Accessed on 13.01.2025].Miles, J., Parsons, M. and O’Brien, S. 2020. Preliminary assessment of seabird population response to potential bycatch mitigation in the UK-registered fishing fleet. Report prepared for the Department for Environment Food and Rural Affairs (Project Code ME6024). Available at http://sciencesearch.defra.gov.uk/Default.aspx?Menu=Menu&Module=More&Location=None&Completed=0&ProjectID=20461 [Accessed on 13.01.2025].NAMMCO, 2022. North Atlantic Marine Mammal Commission: Harbour porpoise. Available at https://nammco.no/harbour-porpoise/#1475844082849-433d5060-e5a9 [Accessed on 13.1.25].NEAFC, 2011. Map of NEAFC Regulatory Area Showing Existing Fishing Areas and All Closures, North-east Atlantic fisheries commission. Available at: https://www.neafc.org/page/closures [Accessed on 13.1.25]Northridge, S., Kingston, A., and Coram, A., 2020. Preliminary estimates of seabird bycatch by UK vessels in UK and adjacent waters. Report prepared for the Department for Environment Food and Rural Affairs (Project Code ME6024). Available at http://sciencesearch.defra.gov.uk/Default.aspx?Menu=Menu&Module=More&Location=None&Completed=0&ProjectID=20461 [Accessed on 13.07.2025].OSPAR, 2017. OSPAR Assessments, Harbour Porpoise Bycatch. Available at: https://oap.ospar.org/en/ospar-assessments/intermediate-assessment-2017/biodiversity-status/marine-mammals/harbour-porpoise-bycatch/ [Accessed on 13.1.25]
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