I have gotten several of these shrimp from the bay here in Rhode island. I call them grass shrimp. They are clear, 1 half inch long, and brackish. The ones I get will live for a long time in full seawater and. Carry eggs all the time. The only problem I have found with them is the same problem I run into with mollies in a reef tank, and that is that they are stupid. What I mean by this is that they do not poses the skills required to survive next to things like stinging corals and anome. It has nothing to do with the temperature or the salinity of the water. They just don't know what to avoid so they all ways end up somebody's lunch.