Blast fishing

Fishing with live explosives. Throw a bomb into the water, all fish goes belly up. Obviously unsafe, but therefore somewhat popular in comedy.

Anime and Manga

 * One episode of Rune Soldier Louie shows something similar: fishing with high-voltage electricity. It's just as effective and just as disruptive to the environment as fishing with explosives.

Film

 * Crocodile Dundee does [//tenor.com/view/crocodile-dundee-dynamite-strange-fishing-paul-hogan-gif-14500215 this] in the opening of the second film. Then the camera zooms out, and we see.

Video Games

 * Borderlands has "Wanted: Fresh Fish" mission, and Borderlands 2 got a grenade fishing side-challenge.

Web Comics

 * THe FReCKLeD FINGeR goes for dark humor, so how about [//www.theduckwebcomics.com/THe_FReCKLeD_FINGeR/5063424/ suicide bomber fishing]?

Web Original

 * "[//www.youtube.com/watch?v=k3XZ4qoKGw0 Trout Fishing - Afghan style]"

Real Life

 * Actually can be (and was) done. It's banned in most remotely civilized places — for several good reasons, from overkill of everything in water to handling explosives in the ways prone to having them lost and/or leading to accidents.
 * Soviet aviation found this "inventive" use for rockets. It's known due to an infamous incident which got Vasiliy Stalin (yes, son of Iosif Stalin) removed from post of a regiment commander: their weapon engineer fiddling with the munition was killed instantly, and others wounded (2 of 7 "fishermen" who got hospitalized per the official report, 6 out of 9 per an unofficial telling of one participant), so this had to be reported.