There are weird transparent shrimp in my ecosystem. What are these?Updated 10 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.