I have to agree with Mike and Cleanbio. i have noticed that if spooked they tend to jump, just like the wrasses in my reef tank. I bred cyps for about 2 yrs specifically the blue flash about 10 yrs ago and stripped with few issues. I found that in a group of 10 that 2 males were good, at least for me personally. I also kept them with featherfins as dither fish and had good "luck". hth
Ron