Croakers were the backbone of a mainstay meal for me & bro growing up on Mobile Bay (fish & grits).
We just scaled em, headed then split the belly open to eviscerate and momma fried em whole for us (we picked out the bones).
Nowadays I treat the medium sized ones like white trout and ground mullet, whiting, spot, etc in that 9"-12" range.
Scale them, than split them down the back, removing the backbone, ribs, head and guts.
This 'butterflied' whole fish can be battered and fried whole with only the fin bones to deal with!
Attachment 2331
Very little wastage ;-)