The claim is a rhetorical characterisation: cod still exists in the Baltic Sea at low biomass; the stock is severely depleted rather than literally absent (zero-catch advice reflects the precautionary approach).
The most acute depletion concerns the eastern Baltic cod stock (subdivisions 24-32); the western Baltic stock (22-24) also collapsed in 2016/17 but the claim does not distinguish between the two stocks.
The main corroborating sources (ICES advice of May 2025 and the fishsec overview of 28 May 2025) predate the session; the 2026 advice cycle (covering 2027) maintained the same zero-catch position, consistent with the claim.
Sources
PrimaryICES — Cod in subdivisions 24-32, eastern Baltic stock (advice report)ICES advises that when the precautionary approach is applied, there should be zero catch in 2025 and 2026 (1). This advice applies to all fleets fishing the stock in subdivisions 24-32 of the Baltic Sea.