Hello.

I find that the interaction between the Smallmouth bass and Crayfish is very strong.

Smallmouth Bass actually excrete a chemical through their skin, which mimics the smell of a crayfish. This smell will make crayfish come out of their hiding spots to protect their territory thinking it's another crayfish and the bass just waits there and gobbles up the unsuspecting crustacean.

http://underwaterfishphotos.blogspot.com/2019/02/why-do-smallmouth-bass-catch-and.html

A+