I caught 4 last year over 80 cm while targeting Red Emperor . I have heard of them schooling up on shallow reefs by scuba guys. As you could well imagine a 88cm jack go bloody hard and are probably some of the unstoppables you hook onto at times . The eating quality really deteriorates as they get bigger. They curl up in the pan and are like rubber, not good eating like the estuary ones .
Hope this helps
Nathan