Interesting thread .... some updates for you:
The Waikiki Aquarium has displayed the following rare/endemic fish species, some of which were considered rare or a new species at the time:
* = currently on display
Griffith's Angel
Goldflake Angel
Hotomatua angel
Chaetodon litus
Chaetodon smithi *
Chaetodon tinkeri *
Centropyge aurantia *
Centropyge colini *
Centropyge nahackyi *
Ostorhinchus sp. *
Pseudochelinus ocellatus *
Clipperton Angel *
Siganus uspi * (21 years in collection)
Genicanthus personatus * (two pairs, one from 1992 one from 2000).
Prognathodes sp. *
Holanthias fuscipinnis *
Bodianus sanguineus *
Leafy and Weedy seadragons *
Cirrhilabrus rosefascia
Pseudanthias carlsoni
Rhinopias sp. (Hawaiian species)
Boarfish (Antigonia sp.) (deepwater butterfly-like fish)
Bearded Armorheads *
Priolepis aureoviridis (Hawaiian endemic goby)
Antennarius drombus (Hawaiian endemic frogfish)
Cosmocampus balli (endemic HI pipefish)
Desmoholocanthus arcuatus
Liopropoma aurora
Paracheilinus bellae
Cirrhilabrus rhomboidalis
Maybe Bruce Carlson can add to this list ...
Also, most of the C. interrupta in the US market are now coming from RCT.