The live-action adaptation of The Little Mermaid was primarily filmed on the northern coast of Sardinia, Italy. Key filming locations included the seaside towns of Santa Teresa di Gallura, Castelsardo, Golfo Aranci, and the small bay of Cala Moresca.

• The beach scenes where Ariel rescues Eric were shot on Rena Majori beach in Aglientu, known for its white sand, jagged rocks, and crystal-clear waters.
• Eric's castle was inspired by the medieval town of Castelsardo, famous for its picturesque sea views and historic architecture. The castle interiors and underwater scenes were filmed at Pinewood Studios in England.
• The fishermen's village and pier scenes were filmed in Cala Moresca, a scenic bay near Golfo Aranci.
• The carriage ride scenes took place along the rugged coastline between Cala Pischina and Rena di Metteu in Aglientu.

The production used CGI and special effects to create the underwater world, while Sardinia's stunning coastline provided the terrestrial backdrop with a Caribbean flair in colors and architecture