i bet the chipokae runs the show in that tank.

That is an Auratus. He won't change colors since I don't have a female in there. His aggressive colors are yellow and black. I won't put a female in there until I move them to my 125 gallon tank. If I put one in there now in my 75 gallon, he would kill everything in there.

Pretty sure that's a Chipokae, had one just like it. I didn't think they changed back and forth with color. All juveniles start of yellow and black, when the males mature they turn the color he currently is right now and stay that way. Keep an eye on your female Johanni with him. My male thought every female was his regardless of what type they were, he killed my female Socolofi and injured many others (that's why he went byebye)

The Auratus are very similar. The striping is just different. My female I had with this one went to "the great white bowl in the sky" and he changed to non-aggressive. He is my big baby. lol