Neil Maidment
Moderator
I have far more extreme examples of fin deformation in my albulm - attributed to otter damage. I would be very surprised if this fish has been retained, it comes from a little fished stretch.............. Tails become torn for a number of reasons. Angling is but one. I shall not use tail damage as a tool for fish recognition as it should grow back in time.
Similar experience with the chub from Throop. Although heavily fished for and sometimes easy to catch, some of the very big and older chub have a variety of fin damage but are still in very good general condition. Some people are very quick to attribute such damage to poor handling, keepnets etc but in my opinion a minority of that damage is caused by angling.
I have fished some almost "virgin" parts of rivers normally closed to coarse anglers and caught chub showing similar damage (particularly split tail fins).