A few (I've given this some thought on several occasions):

Blue Star Leopard Wrasse
(Macropharyngodon bipartitus)


Mystery Wrasse
(Pseudocheilinus ocellatus)


Crosshatch Triggerfish
(Xanthichthys mento)


Gem Tang
(Zebrasoma gemmatum)


Helfrichi Firefish
(Nemateleotris helfrichi)


Achilles Tang


Saddleback Butterflyfish
(Chaetodon ephippium)