The investments are being made by 21 companies based in Wexford, Dublin, Cork, Donegal, Galway, Louth and Kerry, and are supported by grants of €3.2m under an EU co-funded seafood processing business scheme.
Over the next three years, the new investments are expected to boost the sales of added value seafood by almost €44m.
Simon Coveney said the investments show confidence in the sector as a high growth area of the economy, and demonstrate a willingness by Irish companies to address the strong global demand for Irish seafood.
The latest investment follows a previous investment of €7m by 21 companies last year. The food harvest strategy expects a potential revenue growth of €300m in seafood by 2020, increasing employment by 3,000.