The Black Duck Cafe in Westport is shutting its doors after 40 years in business, owners announced.

The message was posted on the restaurant's Facebook Page Tuesday.

"It is with a heavy heart that we announce our closing. We've had an amazing 40 years here in Saugatuck and in Westport. We are grateful for every friend we've had the pleasure to serve and entertain along the way," the post read.

The owners of the floating barge-turned-restaurant did not say why they would be closing.

The Black Duck's last day in business will be Nov. 4, staff says.