is this a bad combo?

[4inchSandBed]

ive got a Arrow Crab and a a Scarlet skunk cleaner together in a 35 gallon hex. Everything was goin great the first day but since then, the cleaner shrimp seems to only hang out on top of the powerhead and wont come down. Is this because its threatened by the arrow crab?? Should i get rid of it

 

[AR15 guy]

The arrow crab will eat it if given the chance. I know a lot of people on here dislike arrow crabs because they will eat cleaner shrimp....or any kind of shrimp. And sometimes fish.