How would you make these bite?

[Sawdustsavage]

Here's a couple of pics of fish on my lowrance elite 7di. Usually on my lake locating them is the toughest part. Once an active school is located it's not difficult to catch them. These and several more schools scattered over the lake had a bad case of lockjaw. Never ran into this before. Beginning to doubt my prowess as a lip ripper lol