Unfortunately marine archaeology is just about the most expensive way to do things and rising sea levels have inundated ancient coastlines. Plenty of interesting artifacts have been pulled up from Doggerland and more recently the Chesapeake Bay.
http://tywkiwdbi.blogspot.com/2012/03/ne...trean.html
http://tywkiwdbi.blogspot.com/2012/03/ne...trean.html