The Jujubaetis - Red has an eye catching (both fish and fisherman) segmentation, slim profile, and is a great choice to fish during a Baetis hatch.
It is also effective for the following mayfly hatches:
Pale Morning Dun
White Winged Sulfur
This fly doesn't stop there.
The Jujubaetis - Red is also used to imitate a red midge or red chironomid, which are abundant in many rivers. This bug is enthusiastically targeted by trout, and this fly will catch them!