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Shifting fish distributions can change where Mediterranean fisheries find fish and what they can catch, but the available regional evidence does not show that these shifts have already caused seafood prices to rise across the Mediterranean. Catch and availability vary by species and subregion, and consumer prices require local retail data to explain.

How much seafood does the region produce?

The latest General Fisheries Commission for the Mediterranean (GFCM) assessment reports that Mediterranean and Black Sea capture fisheries landed 1,117,700 tonnes in 2023. Marine and brackish aquaculture produced a separate 940,000 tonnes that year. These figures describe different sources of seafood: farmed production is not wild-capture landings.

The GFCM’s 2025 State of Mediterranean and Black Sea Fisheries assessment reports data through 2023. It provides a useful regional baseline, but a basin-wide total does not tell you what was available at a particular port, in a particular country, or for a particular species.

What do climate studies project for Mediterranean fish?

Some commercially valuable demersal species may lose range

A 2022 Scientific Reports ensemble study modeled the distributions of eight commercially valuable demersal species. In its climate scenarios, the species’ Mediterranean ranges contracted, with a general displacement toward northern European coasts. The eight species represented more than 32 percent of total Mediterranean landing value in the study’s underlying context.

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This is a projection for a defined group of species, not evidence that all Mediterranean fish are moving north or disappearing. It does not establish that every local fishery will catch less. The result depends on the modeled species and scenarios.

Catch potential varies by gear and location

A separate 2023 modeling study projected changes in catch potential that differed by fishing gear and region. Under a high-emissions scenario, it projected decreases in parts of the southeastern Mediterranean. Catch potential is an estimate of what fisheries might be able to catch under modeled conditions; it is not a record of actual landings or a forecast of retail prices.

What do observed catches show?

For the Italian fleets covered by ISPRA’s indicator, the mean thermal affinity of catches increased across the periods compared. Thermal affinity describes the temperature preferences associated with the species in a catch; an increase is evidence of a change in catch composition, not proof that climate alone caused the change.

Sea division for Italian fleet catches 1987–1996 average 2013–2023 average
Adriatic 19.2°C 20°C
Ionian Sea–Central Mediterranean 20.3°C 22.2°C
Sea of Sardinia–Western Mediterranean 20.5°C 22.5°C

ISPRA updated this indicator on 31 December 2025 using catch data through 2023. It cautions that year-to-year fluctuations can arise from factors other than climate change. The indicator therefore supports the conclusion that the composition of these catches has changed over time, but cannot by itself identify the cause of a particular change in local availability or price.

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Why can seafood availability differ between countries and species?

Regional totals can conceal local differences. GFCM reports similar average regional landings for the two periods below, even as catches in Italy and Spain fell. The country figures are percentage changes between the periods, not total catch tonnages.

Measure 2020–2021 average 2022–2023 average Change reported by GFCM
Regional landings 1,056,600 tonnes 1,053,100 tonnes Similar two-year averages
Italian catches — — Down 9% between the two periods
Spanish catches — — Down 11% between the two periods

The GFCM says small pelagic fish dominate many landings, but the species mix differs among the Black Sea, Adriatic, and western, central, and eastern Mediterranean. A change in one species or fishing area can therefore matter to local supply without producing the same signal in the regional total.

Fishing pressure and management also shape what fisheries land. In its 2025 assessment, GFCM reports that 52 percent of assessed stocks were overexploited in 2023, while describing a decade of falling fishing pressure and improving indicators. Climate-related distribution changes are one part of the supply picture, not a substitute explanation for all changes in catch.

Risk is not uniform around the basin either. A Mediterranean fisheries risk assessment identifies warming, extreme weather, and changes in vertical stratification among the leading drivers of fisheries risk, and assesses the southeastern Mediterranean as a higher-risk area for fisheries resources and livelihoods.

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Which Mediterranean fish are still available?

The regional evidence does not support a single list of fish that are uniformly available across Mediterranean markets. Availability depends on location, season, fishing activity, management, and whether the seafood comes from capture fisheries or aquaculture. GFCM highlights sardine, deep-water rose shrimp, European hake, European anchovy, and common octopus among commercially important species by Mediterranean landing value. That list is not a guarantee of current availability in a given market, nor a ranking of supermarket prices.

Aquaculture is a substantial, separate supply channel in the regional production figures. Its presence helps explain why seafood supply cannot be inferred from wild fish distributions alone, but the regional production total does not establish how much of a particular farmed species reaches a particular market.

Will Mediterranean seafood become more expensive?

The regional climate and fisheries evidence summarized here does not establish a current, basin-wide retail price effect from shifting fish populations. It includes production totals, landings, stock status, and modeled changes in distribution or catch potential—not a comparable series of retail prices and shelf availability by species and country, or an estimate attributing price changes to population shifts.

A projected decline in catch potential does not translate directly into a particular price change. To assess whether a species has become more expensive, the relevant evidence would need to name the market and date and distinguish ecological supply from other influences on retail prices. Landing value is not a consumer price, and a regional landing trend cannot establish what shoppers pay locally.

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