Hmmmm, what do you mean by walking fish then? Only two fish i know of which could be called that and they are Clarius batrachus or Anabas testudineus, both of which are hardcore predators.
Arent those called mudpuppies too? They're newts with gills, whitch means they will attempt to eat everything. I have a newt that ate a tadpole slightly larger than hs head GL
You saw a baby...lol They get pretty big. And they definitely aren't fish!...they're amphibians. They're actually a salamander that never leaves the larval stage, but is still able to procreate. Mean but cool critters.