there are no emperor angels documented from hawaii islands.
this is a common misconception that i hope i can debunk today.
our hawaii shipment contains fishes from marshall island, mainland hawaii and christmas islands. but the collection and distribution facililty is in hawaii, so everyone thinks the fishes that come from "hawaii" shipment, come from hawaii.
flame angels, rhomboid fairy wrasses, helfrichi etc are all caught from marshall islands.
the only real fishes coming in from hawaii are potters angel, lemonpeel, fisheri angels and a few others.
the orange tail emperors from "hawaii" shipments come from christmas islands.
and as for orange tail emperor angels, they exists in every location in which emperor angels are found in. indonesia, philippines, red sea, christmas islands etc etc.
the orange tail is just a slight variation to the normal yellow tail one. and being a variant, they can be found in all oceans. just that some areas have a higher population of these said orange tails. like christmas island.
and as for the dorsal fin streamer, only pacific ocean emperors have the streamers. indian ocean emperor angels do not have the streamers.
i hope this helps.