Talk to Pascal if you see him in town and offer him a scallop for a random piece of furniture from the Pirate Ship set.

Anchor - Give Scallop
Barrel - Give Scallop
Helm - Give Scallop
Keg - Give Scallop
Sea View Wallpaper - Give Scallop
Ship Cannon - Give Scallop
Ship Compass - Give Scallop
Ship Deck Flooring - Give Scallop