I was thinking about this the other day - Does anyone else remember a post on here a while back that was very interesting and ended up with a massive number of posts? It was regarding summer cod and whether they were a separate species, why they were never caught in winter, did they lose their colour and appear as fresh run, why did some return to the rocks, why were they coloured so etc etc.
It was very interesting reading, different theories and perspectives. Also interesting there didn’t seem to be a definitive answer.
I was thinking that if (if) the colour is due to the kelp, I say if as this was only one theory for colouring, how long does it take to take on the red. There was a catch report last year in June for a red codling. If it was red in June in may have been in amongst the kelp for a while already to take on the colouring.
That was my thought