A willow cat looks really close to a bull head but the tail is bigger and round. I have a aquarium full of them from last year, the willow cat has a slime coat or a scent that really seems to attract the walleyes! And a venom in there fins that STINGS BAD it will make your hand swell up in a hurry!!!
I have never caught them in the river…but thats all Im saying about that
They do like to hide in the rocks I have lawn scape rocks in the aquarium and they swim between them and go right the the bottom glass of the tank but to find them in the wild there in the weeds!
The plastic I havent had any luck with! None zero zilch…But im not saying they dont work they just dont work for me!