Roughly how quickly do these little dudes grow? (to a cm or so)
And is there a reason that the pregnant shrimp is one of the smallest? And the other,
larger females arent? (or will they soon be?)
I never really took much notice on how fast they grew when I had mine. At a guess, it probably takes about 6-8 weeks for them to get to 1 cm or so. Obviously it depends on how well they are fed and the temperature.
Not quite sure what the answer is to your second question. It's probably just a younger pregnant shrimp