I have 3 rcs left. 1 is solid red, 1 is clearish with red markings. The last 1 i hadnt seen for a while now so i thought it died somewhere.... Well i was checking out my molly to see if she started giving birth yet and this hideous looking shrimp ran across the gravel it was almost completely colorless!!!! Why is it losing color? There is a "yellow saddle" does this indicate female or pregnant?? No it was definitely not an exoskeleton. It was very much alive and very much not a red cherry shrimp anymore this explains why i hadnt seen it, it had no color and would of otherwise been invisible to me if it hadnt ran directly in my sight.