Ahh good pic.Now i know what type of shrimps i've got.
I bought one originally but went and got another two.They are really amusing to watch and seem to be out all the time.When i put food in,bloodworms are a fav,they run out and grab loads fighting off the fish.
Mine have turned out to be a male and two females.Both females are carrying broods which they release into the water as baby shrimplets.Unfortunately the fish eat them all.