The Mini perch Fry
A purposed made fly to imitate the small perch fry as they grow from egg till small fry.
Easy tied and can be fished on a floating or intermediate line dependent on depth where the fry shoaling.
There are many successful fry patterns out there,this little pattern can be deadly when the fry reach a size to interest the rainbow trout.
You may have to be intuitive with your retrieves ,study the small shoals will let you see how they dart about in the water.
Mini Perch Fry