Orchid dottybacks (
Pseudochromis fridmani) are known to be one of the least aggressive dottybacks. I've kept them before with no issues. Strawberry (Magenta) dottybacks however are terrors.
Aggressiveness rating: 2
http://www.reefkeeping.com/issues/2007-12/fish/
http://www.reefcentral.com/forums/sh....php?t=1807500