Trout tickling is the art of rubbing the underbelly of a trout with fingers. If done properly, the trout will go into a trance after a minute or so, and can then easily be thrown onto the nearest bit of dry land.
Trout tickling has been practiced for many centuries. It is mentioned in Shakespeare's comedy Twelfth Night, where it is used as a metaphor for bamboozlement by Olivia's servant Maria, who is about to play a vengeful prank on the pompous steward, Malvolio:
Close, in the name of jesting! Lie thou there,
for here comes the trout that must be caught with tickling.
The technique was a common practice used by boys, poachers and working men in times of economic stress, particularly during the 1930s depression-era. Poachers using the method required no nets, rods or lines or any other incriminating equipment if apprehended by the police or gamekeepers.
The fish are watched working their way up the shallows and rapids. When they come to the shelter of a ledge or a rock it is their nature to slide under it and rest. The poacher sees the edge of a fin or the moving tail, or maybe he sees neither; instinct, however, tells him a fish ought to be there, so he takes the water very slowly and carefully and stands up near the spot. He then kneels on one knee and passes his hand, turned with fingers up, deftly under the rock until it comes in contact with the fish's tail. Then he begins tickling with his forefinger, gradually running his hand along the fish's belly further and further toward the head until it is under the gills. Then comes a quick grasp, a struggle, and the prize is wrenched out of his natural element, stunned with a blow on the head, and landed in the pocket of the poacher.
In Scotland the technique is more often called "guddling" or sometimes "ginniling". The practice is currently illegal under most circumstances in Britain. A related method of catching catfish by hand is called noodling in the U.S.A.
In history and fiction
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The fish in careless ease supinely laid,
The grappling fingers of the swain invade.
Up from the deep he springs and bids the prey
Recant his error in aerial day.
Aelian, a Greek writer of about 230 A.D., writes in his De Natura Animalium (as published in England in 1565): "If men wade into the sea, when the water is low, end stroking the fish nestling in the pools, suddenly lay hands upon and secure them." While in Francis Beaumont and John Fletcher's Rule a Wife and Have a Wife, a ribald comedy dating from 1624, Estifania remarks "Here comes another trout that I must tickle, / And tickle daintily".
The technique is also mentioned in several of Shakespeare's plays: in Twelfth Night, the servant Maria refers to the approach of the hated Malvolio, head of Olivia's household, with the words "for here comes the trout that must be caught with tickling" (Act 2, Scene 5). Maria and others are conspiring to trap Malvolio into acting foolishly by forging a love letter from Olivia.
Trout tickling is also mentioned in later works: Mark Twain wrote about catching catfish in a similar manner while mentioning that salmon and certain other species can also be lured and caught in this way. Arthur Ransome's novel The Picts and the Martyrs contains a detailed description of the technique by a young boy from the English Lake District. It is also described as a poaching method in Roald Dahl's classic novel Danny, the Champion of the World, in Linda Buckley-Archer's science fiction novel Gideon the Cutpurse, in Robert A. Heinlein's fantasy novel Glory Road, and in the video game Theme Hospital as a hobby of many of the staff for hire. Terry Pratchett's 2003 young adult novel The Wee Free Men opens with young Tiffany Aching amusing herself by tickling trout.
An interview conducted by CSV/BBC NI's Brian Morgan, Story of the Virgin Soldier, for the BBC Peoples War project, reports how one soldier, Robert McIlroy, impressed his senior commanders by 'tickling trout' out of the river in order for fellow soldiers to eat. 
In the book The White Mountains by John Christopher, one of the party members (Henry) attempts to tickle trout unsuccessfully in an attempt to forage food for the group.
In an episode of The Waltons ("The Search", S. 4, E.15), Olivia, Jim Bob, and Elizabeth set out to visit a friend but become lost on Walton's Mountain, and while lost Jim Bob catches fish using this method which he had learned from Grandpa.
- "Trout Tickling: Catching a Fish with Bare Hands". Retrieved 20 November 2014.
- Brian Morgan. Story of the Virgin Soldier (Trout Tickling): Part of the BBC's WWII People's War Series. 12 May 2005. Article ID A4057706. Accessed on: 16-1-07.
- s:Twelfth Night, or What You Will. Act II. Scene v.
- 1941 U.S. Parks and Wildlife Service article
- A.A.Richards. "Trout fishing-Tickling Trout". Archived from the original on 2007-09-27. Retrieved 2007-09-06.
- See for example: Introduction to the Regional Rod Fishing Byelaws Archived 2012-12-16 at the Wayback Machine Environment Agency. Retrieved 19 October 2012.
- Morgan, Brian (12 May 2005). "Story of the Virgin Soldier (Trout Tickling)". BBC.com. British Broadcasting Corporation. Retrieved 10 December 2019.