The site is well appreciated for its walk fishing.
Many people like Piriac-sur-Mer due to beach fisheries. Indeed, there are many spots of fishing that people like to use when tidal coefficient is good. You can fish oysters, periwinkles, mussels, clams, shrimps or crabs.
Piriac tourist office organizes workshops to discover fisheries and underwater treasures. The local association “Les Alguistes du Castelli” (algae from Castelli) explains to you all differences between algae and how to eat some of these.