Just saw that Scott from Scott Gray Fishing is getting on some school Tuna, mainly small around the 8kg mark with the odd better sized.
I also came across some tagged tuna data shared by Tuna Champions on Facebook where 20+kg tuna had caught, tagged and released.
It made me think, what would be my keep/release size tuna.
I suppose it would depend on whether you came across a big school, or lone fish, but what would you cutoff be?