Many shimp will deepen their color in an effort to blend in with their surroundings and yours just happens to work. This could be it but to know for sure, what are your water parameters? Thankmates? Are you adding any chemicals to the tank? Salt?
Hormonal levels do affect coloration in dwarf shrimp. Especially in Noecaridina species. Usually cherry red shrimp will have a Brighter color when berried.
Many shimp will deepen their color in an effort to blend in with their surroundings and yours just happens to work. This could be it but to know for sure, what are your water parameters? Thankmates? Are you adding any chemicals to the tank? Salt?
Temp 74f, Amm: 0 and Nitrites are 0
BUT I just found that the PH in that tank had dropped to below 6.0
I try to keep the PH more around 7.0 but I do have ADA soil in that tank.
That off seats out high 7.8 tap water.
Also I found her UNDER some drift wood in a dark spot!