I don't believe this shrimp was dead when the Amano found it, I think it was trying to moult. I overfed this tank trying to get my Boraras maculatus to breed, in particular too many microworms, and I had a real snail explosion as well as a bad cloudy water situation going on. I stopped feeeding foods that foul the water entirely while I tried to resolve the cloudy water. There were plenty of Moina and copepods in the tank for the boraras to eat and actually the moina have been reproducing in the tank while they fed on whatever bacteria was clouding the water. I didn't consider the fact that the tank doesn't actually have any visible algae at all for the amanos to eat - and this is the result. The moina lifecycle is quite short so I hope they've not got a taste for crustaceans from cleaning up any dead adult moina.
Fissidens fontanus on the right and some recently added Riccardia on the left.