Here's one for you all....
Caught a few of my shrimp and noticed this funny stuff all over them (it was on my thermometer and ropes as well, so I doubt it parasitic). I'm guessing the blue color is from the aquashade I added.
My guess is it's insect eggs? If so, they should apparently be of no concern as they'll be gone when the shrimp molts.
Here's one of the shrimp
