Which is the largest estuary in the world?

“The largest estuary in the world is the Saint Lawrence River [estuary] which connects the Great Lakes with the Atlantic Ocean … The majority of the estuary is located in Canada but portions of the river do touch the borders of New York. The estuary is over 1,900 miles long and the watershed occupies 390,000 square miles …”

(Source: <http://www.dnr.state.md.us/mydnr/askanexpert/estuary.asp>, retrieved on March 27, 2009.)