Celtic Wave project manager Sue Thomas said: "The project represents an important strategic alliance between Wales and Ireland.
"Our partnership will give us a new competitive edge in efforts to increase cruising within the Irish Sea."
Anglesey Council is leading the project, which links the ports of Holyhead, Milford Haven, Dublin Waterford, Cork, and Swansea, after receiving three-year funding from the European Regeneration Development Fund.
Ms Thomas said the aim was to develop a Celtic Wave brand and to market the whole of the Irish Sea region as "one unique destination with a wealth of cultural experiences".
Assembly Deputy First Minister, Ieuan Wyn Jones, welcomed the idea of Celtic Wave.
He said: "As demand grows for cruising holidays it is vital that we are able to maximise the potential of this market.
"The Celtic Wave project will make significant steps towards this, attracting more visitors, boosting local businesses and benefiting the economies on both sides of the Irish Sea."


