Hah hah hah, my favourite topic.
Rhinecanthus can be kept with many of the more resilient fishes, such as Morays, Puffers, Damselfishes, Angels, Surgeonfishes, certain other Triggers, et cetera. I do not usually recommend the Humuhumu Triggers to be kept in a general community tank, as they are highly predatory and very territorial. I have seen these fishes in the wild, around the Big Island of Hawaii; the adults were continuously chomping Acropora corals, and the juveniles were chewing on rock. Each juvenile fish had a small tunnel in which to reside, and the adults would cruise in the open water. They are reputed to attack divers (though I did not experience this behaviour) and thus tankmates must be very tough.
Triggers are, in my opinion, the best fish there is; they are intelligent, colourful, and personable. They are also very impressive fishes; this also happens to be their downside. All are often listed as non-reef-safe by websites that sell fish, but this is not true, as there are actually four reef-safe Triggerfish genera. These are:
-Melichthys; M. vidua is perhaps the most gentle fish on Earth
-Xanthichthys; many colourful species in this group; no experience with these
-Odonus; the most aggressive of the reef-safes
-Sufflamen; very docile, but I have no experience with these so I cannot be sure of the degree of reef-compatibilty; it is reportedly fairly high
These would be much more compatible in a general community tank; Clown Triggers are also peaceful until the length of about 8'' is reached, at which point they can become absolute tyrants. Avoid Lionfish if keeping the Humuhumu; they are reportedly annoyingly adept at removing the fins of Lionfishes.
Queen Triggers, Blueline Triggers, Titan Triggers, and Undulate Triggers are all aggressive Triggers and should be kept either with incredibly robust, tough fishes (a Rhinecanthus could be squeezed in with them) or alone. Be warned, also, that all Triggers are very capable of injuring the very hand that feeds them!
What size is your tank going to be? I would recommend no less than a 75 gallon tank if it is to hous the Humuhumu for it's whole life.
Hope that covers it!
-Lynden
I already know how these fish act, and they are agressive lol....
