Theres definitely more, they’re sensitive to light. I’d try leaving lights out for a day so they come out of the substrate and then vacuum the gravel (obviously watching out for the shrimpies). I recently had scuds in our shrimp tank and it got bad enough we replaced the substrate entirely :/
DoubleDogDamnit 
is that a scud? Those things will eventually out-compete your neocaradina shrimp if its a shrimp only tank.
It’s a shrimp killer, take it out and kill it before your colony is dead
Theres definitely more, they’re sensitive to light. I’d try leaving lights out for a day so they come out of the substrate and then vacuum the gravel (obviously watching out for the shrimpies). I recently had scuds in our shrimp tank and it got bad enough we replaced the substrate entirely :/
I find something similar in a nearby stream.