Pholas dactylus Directory References Discover Timeline of the 1990s The 40th Anniversary of Star Wars What Is the Most Widely Practiced Religion in the World? Cruel and Unusual Punishments: 15 Types of Torture 10 Famous Artworks by Leonardo da Vinci 10 Greatest Baseball Players of All Time Weapons of World War I Contents Ask the Chatbot a Question Pholas dactylus clam Ask the Chatbot a Question Learn about this topic in these articles:description In piddockPholas dactylus, which bores into gneiss—a very hard rock—is luminescent. At one time it was highly esteemed in Europe as food. Pholas chiloensis, found on the Pacific coast of South America, is eaten locally.Read More Britannica ChatbotChatbot answers are created from Britannica articles using AI. This is a beta feature. AI answers may contain errors. Please verify important information using Britannica articles. About Britannica AI.