I was sold a group of Shellie’s some time ago and got 2 of these in the bag. Now that they have grown out some there clearly different from the Shellies. Any help ID’ing these will be greatly appreciated.
They should come out of the Tang tank, but whether they should go in the mbuna tank depends on what else you have in their, and dimensions of the tank.
What DJ said - not a good fit in a Tang tank and probably best to move into the mbuna tank if you have one - BUT depending on size/dimensions of the tank and what's already in there.
As for common, depends on who you ask I guess. Not common at all in my area, I've never even seen one in person myself - but I live in a small city and our fish selection is very limited lol. I'm fairly certain they've become relatively common in some areas over the last few years.
I have larger tanks with South American Cichlids but these would be lunch for those. So I can always move them once they get larger but for now what tank do you think?