Its possible... i've spotted my RCS produce dark/black colored shrimplets too, i guess its one of the regressive genes that pop up randomly in their shrimplets.
Quite rare though, in my shrimp tank of around 90-100 RCS, i've only spotted 3-4 at any one time, but all very small juvenile ones, haven't seen a full grown black one so far, could be either they gradually change back to red color over time or just died off before reaching adult size.
Bookmarks