Where was Sea Devils filmed?

1953 film by Raoul Walsh

Sea Devils (1953) was filmed in Channel Islands, Saint-Malo, Concarneau and Walton-on-Thames, 4 places named in its Wikipedia article, in Jersey, France, the United Kingdom. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

See them on the map → Wikipedia Source data