Poisonous Fish are a species seen in the novel The Wandering Inn.
These fish are normal-sized fish with a large toothy mouth that live in a stream in the Flood Plains. They are predatory and can attempt to jump out of the water and pursue their prey on land, though they cannot move more than a few meters. They are inedible, as they contain a dangerous yellow poison. If left dead on dry land, they will attract a wide number of Acid Flies at a surprising speed.