There are weird transparent shrimp in my ecosystem. What are these?Updated 9 months ago

The shrimp shed their skin from time to time, so it may be their exoskeletons. 

If the shrimp are unhappy they will turn a lighter colour, please move them to another area of the room is this happens.  If they have been somewhere light, try somewhere a little more shaded, and visa versa.  Never leave them in direct sunlight, on a window sill, or near a heat source.