You can take the fish out of the sewer, but you can't take the....ew. Throw it back.

A "giant mudcat" caught by Naegli. It did start singing, but it had a really filthy mouth.
(screengrab via Kyle TheFishWhisperer)

Not many fishermen get full profiles written about them in non-fishing magazines and papers, let alone Texas Monthly and the Houston Chronicle, let alone at the age of 17. But not every fisherman is a 21st Century pioneer like Kyle Naegli of Katy, TX, or as he's known online, "Kyle TheFishWhisperer." Kyle's whispered fish in all sorts of original ways—for example, using remote-controlled toy boats to fish on a pond—but he's best known for bringing the bounties of the local sewer system to the Web's attention.

A literal fishin' hole. Well, manhole:

One thing Kyle apparently knows is that sewer fish have a taste for human food, so in lieu of live bait, he uses hot dog bits to lure his prey. Specifically "the cheap ones," he told the Houston Chronicle. Once they've been snagged, he dives head-first into the manhole to pull the catch out.

Strawberry hot dogs make great bait:

Of course, it doesn't always go perfectly:

Kyle practices catch-and-release, in part because he's a responsible fisherman who wants to protect the delicate ecosystem of the sewers, and in part because the fish are covered in excrement (to be fair, Kyle says most of the water in the system is actually overflow from a nearby pond).

The full playlist:

The above video should begin a playlist of all of Kyle's adventures in the sewer, which I highly recommend. I do want to add that I also enjoyed his less-filthy adventures using an RC boat as a sort of throwback Predator drone for fish:

In conclusion, let your kids play outside in the sewers (bear with me, here). Not only will they learn self-reliance, they'll probably build up immunities to everything and avoid allergies. They also might become YouTube famous, and that's the most important part of growing up in small-town America today.