Woke up this morning and saw one of my peppermint shrimps not moving much and starting to loose color. Within the hour I found him on the bottom of the tank ... first casualty in my 4-week old tank. Had him for 2 weeks. The other 2 that came in the same shipment look fine and are acting well as are all the other fish that I got at the same time (2 fire shrimp, 2 banana wrasse). I know the circle of life happens and this will obviously not be the last but it does make me wonder about a few things: 1 - How long do peppermint shrimp (and other's) live for ? 2 - Is there any way of knowing how old an invert is when you purchase it ? 3 - If i get another one, will the other shrimp accept it - they seem to thrive in small groups.