Learning from the "fish"

[kapw7]

Everyone has been a victim of this typical fish play. You raise PF - fish calls. You miss the flop but bet your KQ overs - fish calls. Turn - the same. River you give up and check - fish bets.

So this is my hand from a Ladbrokes 6-max table.
I am on BB with 79s. CO (26/18/2) open raises, folded to me - I call.
Flop is 68Jr. CO bets - I call
Turn is a 2 (no FD for me). CO bets - I call
River is a 4. CO checks - I bet