Great shrimp too- not at all shy... I got 6 from an auction a couple years back- very pretty shrimp- although they don't stand quite out as much in a tank full of Cherrys... LOL- they tended to blend in a little.
One of my propinqua slowly turned brown- didn't seem sick- I think it was one of the longest living ones... I don't know how old mine were when I got them but they gave me 6 months to a year before they joined the giant decapod spirit in the sky. Shame they don't breed in freshwater- I'd love to still have some.