No way was luck involved, pure skills and thrills! Well done man! About the only thing I can do over the side of the yak without tipping is spew, let alone reach in and tail a massive fish like that. Top report too.
"The gods do not deduct from man's allotted span the hours spent fishing”
Once the line was "broken", the fish had earned its freedom, so personally I think you should go down in the records (somewhere) as the only bloke has ever caught a spanish mackeral by hand without bait or lure - don't let the truth get in the way of a good story!