I bought a "fish trap" off the internet to catch my yellow pseudochromis...did the same thing, ate all my shrimp. I got it on E..y. Did the trick, I think it was $8.99 plus shipping. Best money spent. I unfortunately, after catching everything I didn't want to catch at first with live brine shrimp....I had to bait the trap with a live cleaner, nothing seemed to work. I tried brine, mysis, and bloodworms all live. I bought a small cleaner shrimp, :scared: I know I will get flamed big time for this, but it worked. Only thing else was to take the tank apart, and stress the other fish out , I was not willing to do this.
By the way, I did research this fish first.....nothing was said that it may eat ornamental shrimp. Mine sure did. Everything was positive on how it was the perfect reef safe fish, would go after bristleworms....HA! LOL! Never touched them. Only the shrimp.
Only, after the fact of eating the first shrimp did I do a search on pseudochromis' and shrimp did it pop up with the potential to do just that. So when they say to research.......they mean really research!!!