WORLD'S LARGEST BAY
THE LONGEST LIST OF THE LONGEST STUFF AT THE LONGEST DOMAIN NAME AT LONG LAST

What was the world's largest bay?

The world's largest bay can be found in the northern Indian Ocean.

It is the Bay of Bengal and covers a watery 2.2 million km² and reaches a depth of up to depth of 5,258 meters.

Hudson Bay, in Canada, is the world's largest bay measured by shoreline,  which covers 12,268 kilometers or 7,623 miles but the bay itself dwarfs compared to the Bay of Bengal at a mere 1.23 million km².