"Fishguard" derives from Old Norse meaning "fish catching enclosure", indicating that there may have been a Scandinavian trading post, although no evidence has been found. However the "V" shaped stone structures of ancient fish traps can still be seen at low tide on both sides of the bay and it is believed these were the foundations for wooden fences that would trap the fish as the tide went out. Other examples can be found around the country and they probably date from Saxon times, though similar devices have been in use since Neolithic times.