Robert:
I have seen them caught with bits of nightcrawlers...but
was told at one canal in FL where they were catching them
that they were using some sort of weed that grows in a creek
close by as bait. They said that the tilapia were mostly grass eaters.
They wired the grasslike weed onto a brim hook with a twist-tie
wire that had the paper removed, and fished under a float.
It was interesting!
tnvol