You entered all of the Guranrds? I really only enter the heavier of the fish caught and either release or keep any of the lighter ones. Last year they only gave out a prize for the largest fish per entry, the guy down from me entered everything he caught but still only got one prize, so a lot of fish were killed needlessly.
I probably would not enter the Kaikoura competition again until they put measures in place to reduce the amount of fish which goes to waste. At least in the last few years they have been keeping the fish on ice, but these more which could be done.