There was a low 20 in a little complex I was a member of,it was the biggest in the lake ..sadly it got dropped and landed side on ,on a scaffold pole, on a bordered a bark swim ..we all thought it was going to die ,injuries were awful ..but on advice it was put in a salt bath and survived and grew ..
The amount of Carp I've caught with predation damage is unreal ,and yet as long as the fish actually survives ,regeneration can occur ..here a pic of my first fish from a little water ,its clearly been munched at some point ,and has started to grow back..
I guess I'm trying to say carp are proper tough creatures.