Armored Catfish

Armored Catfish, not really related to catfish, they live in large schools on the beds of rather filthy water. They don’t pose a dangerous threat on their own, but because they are armored and lay on the floor, they can cause people walking through tainted waters to loose their balance or trip, they are also large enough that occasionally they might run into someone’s feet and cause them to lose their balance, plummeting them into the tainted waters.