From various Georgia bands including the Skillet Lickers...

PETER WENT A FISHIN'

Late last night when Peter went a-fishin'
Caught a big mudcat (!!!!!), put him in the kitchen.

There must be a longer song to this, but it's all I remember hearing, just a fragment.

And of course there's the song that in some parts of the south is everybody's starter banjo tune because it's just a few simple notes. Related to the BANJO SAM that Wilmer Watts sang in the 1920s and I still sing.

HOOK AND LINE

Gimme a hook, gimme a line,
Gimme the girl they call Caroline.

Bait my hook to catch me a shad
But all I caught was my old dad.

Throwed my hook in the middle of the pond,
Catfish got my hook and gone.

Throwed my hook in the middle of the hole,
Catfish got my hook and pole.

Not exactly seining or deepwater trawling, but could apply!