A few weeks ago, I bought five 珍珠蝦. They looked fine for the first few days and no fish had attacked them. One day when I returned home and counted the number of 珍珠蝦 in my tank, I found two of them missing

A few days later, another one disappeared too. I could hardly think of a reason coz there were no dead bodies found inside the tank. Suddenly, a few days ago, I found a dead body which looked like a 蝦米 on the ground. I suspect that those missing 珍珠蝦 had climbed out / jumped out from the tank and died.
Can 珍珠蝦 live without water ? 