Hey a fish was caught on last trip was 44 inch (111.7cm)long and weighed 28kg and it wasnt a very fat fish. But you will never know for sure how much yours weighed so I would just estamate around 30kg and just be happy with a great fish, I think way to much energy and time is wasted with people argueing over weights and sizes of fish and in the end they forget it is all for fun and forget to appriecate a good catch weather the estemated size is exact or not, I find it really takes away from the whole experience.