|Saint Gousan with his fish|
(fish hidden for copyright reasons)
Goustan was born in Cornwall in 974 and was kidnapped by pirates when he was 18 years old. As they went on their piratical way Goustan hurt his foot. He was abandoned on the Island of Houat, near Vannes. His life was saved through God's intervention with miraculous fish.
Hence the fish (actually probably a porpoise) with Saint Goustan.
Each day Goustan ate a part of the fish and kept the rest for the next day. Then miraculously each day the fish was made whole again.
Saint Goustan went on to found a monastery having been converted to the faith by Saint Felix. Now Saint Goustan is the patron saint of fisherman.