Each one of the pictures below is entitled "Unknown Fisherman." Is an Unknown Fisherman some sort of archetypal figure? He is symbolic by his very nature, for we know nothing about him. What does his appearance suggest? Is he a manifestation of the Fisher King of Arthurian legend? And/or a Christ figure? Does he hold the Salmon of Wisdom from Irish mythology?
Here's an anecdote by a person who carried an Atlantic salmon fly from one corner of Europe to the other, with the sole purpose of giving it to an unknown fisherman
. The quest sounds like some sort of pilgrimage, and the gift sounds like a tribute to a deity.
(In the interest of full disclosure, I am against the pestering and/or killing of fish.)