|Þis ȝeƿrit hæfþ ƿordcƿide on Nīƿum Englisce.|
Se Īrisca Sǣ scādaþ þā īega Īrlandes and Grēatre Brytene. Hit is gadertang mid þǣm Atlantiscan Gārsecge (the Celtic Sea) by St George's Channel betwēonan Īrlande and Wēalþēode in the South and by the North Channel betwēonan Īrlande and Scotlande in the North.
Sēo Mannīeg ligþ middeweard þæs Īriscan Sǣs.
Ferry connections between Britain to Ireland via the Irish Sea include the routes from Swansea to Cork, Fishguard and Pembroke to Rosslare, Holyhead to Dūn Laoghaire, Stranraer to Belfast and Larne, and Cairnryan to Larne. There is also a connection between Liverpool and Belfast via the Isle of Man.
The Īrisc Sǣ Forum is an environmental forum, þe cēpaþ þæs Īriscan Sǣs.
Se Īrisca Sǣ has been subject to heavy radioactive pollution by the first British weapons grade 239Pu nuclear production plant and power station at Windscale. An estimated 250 kg of plutonium have been deposited in marine sediments during the first decades of production.
Se Īrisca Sǣ has undergone a series of dramatic changes over the last 20,000 years swā the last ice age endode and was replaced by warmer conditions. At the height of the ice age the central part of the modern sea was probably a long freshwater lake. As the ice retreated 10 000 years ago the lake re-connected to the sea, becoming brackish and then fully saline once again.