[sanadw]

That is a (Giant trevally) locally called (yip or jush too) have a secret stone area... or as they call it the SWEET SPOT!!!
in the spine very near to the tail.... if you miss it, be ready to ski!!!
most of the time swim in groups near rigs or in shallow stoney beds, usually they come out of no where!!!

one good thing to bring them closer is shining metal or metal reflection, flashers will work great with them.... some spearos uses there knifes they just let it sink (in shallower water for sure) and the group will come closer to investigate