Your Orange one looks like a metriaclima Estharae Red. the one with the black stripes looks like a Labidochromis...yellow lab for short...the one with the stripes could be a kenyi...Im new too but that is what I have and have done a lot of research on. If you have a 55g, throw out the old rule of thumb; one fish per gal. Cichlids need overstocking to prevent aggresion. If you keep only those 3 you will not be able to enjoy them, they will be trying to kill each other instead. Good luck