I've kept various Caridina cf. cantonensis and recently tried a few C serrata for a new (well, set up in April but new to shrimp) tank. They were home bred little juveniles, and I figured I had several months before I would see berries. The largest ones are at about 1/2" or 1.27 cm now and multiple females are already berried. My bees need to be twice this size before they berry for me. Just found it interesting. Substrate of Flourite and a little ADA for scale. I'm guessing these fry are going to be tiny!