I recently lost one of my female rainbow fish for reasons unknown. The remaining rainbow fish are a pair of turquiose rainbows, 1 orange male(unsure of the name), 1 neon rainbow with the orange fins(male or female?), and one red and black striped rainbow which i think is a female. All of these had a mate at one point in time and they have died and now I am down to just one actual pair. The female I just lost was paired with the orange male. She looked a little mutalated so im not sure if they beat her up or what. Considering the male to female ratio now, is it safe? How do rainbow fish behave when there is no male/female for them?