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Kinda off topic, whats your experience keeping different species of butterfly together? I am about to add a longnose to a 180 with a copperband, both 3-4".
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Unless it is a true pair that may not work, as they are gonochoric and so cannot change sex to suit their environmental status. Though some species seem to be more tolerant of conspecifics than others from what ive seen like the heniochus.Following.
I am considering x2 Henis if I cannot get the Kole from Hawaii due to the virus + trade war.
Heard Roaps subgenus are among the hardiest too, but they command a high price, only sporadically available where I am, and may not be at a desirable size. Henis come in all sizes where I am and are almost always available. They’re Bannerfish.
As for the ease of keeping different butterfly species, from the books I’ve read WWM and Scott Michael don’t agree on a couple. Scott Michael rates the Yellow Pyramid and congeners a 4/5 but Bob Fenner only gives them a 2/3 with 1 being the hardiest and 3 the least. Scott Michael rates the Klein’s a 5/5 while it’s another 2/3 for Bob Fenner. Michael rates the two species of Yellow Longnose both a 4/5 but Fenner only gives them a 2 instead of a 1. They agree on most of the other species though including the relative difficulty of the Chelmon and Chelmonops genus, the hardiness of the Roaps subgenus, Barberfish, Auriga and Pacific Raccoon, and the hardiness of some species of Heniochus (not the brown ones).
Scott W. Michael gives full marks to the Longfin Bannerfish and Schooling Bannerfish, Tinker’s, Klein’s, Barberfish, and a couple other Roaps I think.
Thought it would be interesting to compare the advice of two different experts, though I’d be far more interested to hear your experiences.
For most butterflies would introducing them as a pair, at the same time be okay?
Kinda off topic, whats your experience keeping different species of butterfly together? I am about to add a longnose to a 180 with a copperband, both 3-4".
Not sure who you are asking this to, but I have not kept either one of these two so I can't say.
OP seems to have a lot of experience !I was just asking to this thread in generalOP seems to have a lot of experience !
www.reef2reef.com
Info on c.fremblii.
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Blue striped butterfly fish, Chaetodon fremblii
So I have exhausted the whole 3 pages of Google search for this one. [emoji53] Only took 3 hours to read everything available so far on this fish. Seems it will eat a variety of foods (nori, black worms, frozen mysis, frozen calanus, frozen vegiblend) and possibly SPS. Difficult to get...www.reef2reef.com
Tinkeri sounds like it might be a good option for you. I have seen several pairs sold in past years. I remember TSM corals sold a pair. Why don’t you contact them to ask if the Tinkeri butterflies usually arrive paired or if not - their tips on pairing them together.
You have experience with butterflies & are obviously skilled at keeping them. Some members here I’m sure will be able to help you source a vendor that has a pair.

I've had pairs of the following:
Chaetodon punctatofasciatus
Chaetodon guttatissimus
Chaetodon miliaris
Forcipiger flavissimus
Chaetodon xanthurus
If you lose one, though it is near impossible to add another. So currently only have pairs of
Chaetodon miliaris
Chaetodon xanthurus
I didn't purchase as pairs, just added them at the same time. Some species, you will find in groups at your LFS (I've seen that a lot at That Pet Place). Heniochus acuminata seem to prefer schools, though do fine solo too. Mine are in a mixed reef and leave the coral alone... though cannot have any frogspawn or related corals.... of course they are very well fed. I would not mix any of these with any Chelmon species as they are too contemplative eaters to keep up with a Chaetodon feeding frenzy!
Hope this helps.

