Old Adirondack Mt. trick of fishing "spiders"....look it up. Basically, the trout has a brain and can therefore learn after being stuck, pricked, hooked numerous times, therefore it learns that an insect moving/jerked is a REAL one and not going to hurt it.
A neuron is a neuron no matter what species it happens to be sitting in, except maybe a 15 y.o. male!
I am a great admirer of spectator sports, especially on television; it keeps the riffraff off the trout streams.