well i had 6 but then Pinchy the PP died so i was in Petco thinking of getting more sand, but the guy that is always there gettin' my hermit crabs got me to get another one so we both went through both tanks picking through all of the crabs and i chose a medium PP, and got home and named him Dozer! hehe, man, he's def. not shy, lol i was moving my tank around to a diff. room all the others went in their shells, he just stayed out. didn't care that i was walking down stairs. so hopefully he'll come out when i hold him and he gets used to me!