Smallmouth versus largemouth bass - identification

Distinguishing small mouth bass and large mouth bass

To tell small mouth and large mouth bass apart, look at the closed mouth. If it extends back beyond the back of the eye, the fish is a largemouth. If it goes only to the middle of the eye, it's a smallmouth.

Diagram of difference between small and large mouth bass: Back of mouth goes beyond eye--it's a large mouth bass; if the back of the mouth goes only to the middle of the eye--it's a small mouth bass.