bert, I was looking on the web and found a site that might help explain some of the behavior you and Allie described in Kribs.
http://www.justbajan.com/pets/fish/s...nsis/index.htm
Sounds like even though my first reaction is that the Roseline shark would be a bad companion, that in fact it is probably perfect. It distracts your kribs from fighting between themselves......Just keep a close eye out

, and if your male and female start picking on each other SEPERATE them quick, before the same thing happens that happened with Allies fish!
Good Luck, & I'm looking forward to those pictures of fry!