I gotta saltwater tank to get that exact pair. Then I found out how much the pistol digs and grabs coral frags and moves them around or uses them as doors. Then I thought about how they also like to bury frags. I then had second thoughts.
Found that and the cost of constantly buying snails and ornamental crabs far outweighed the coolness of the pistols.
Had one that disappeared into my liverock, survived a tank change and everything. Finally had to get rid of the rock itself as he would never come out far enough to catch.
That being said, they are likely my favorite "odd couple" to have.
I think even beating out clown/nem