This is the video I recorded when an Amano Shrimp tried to pick out the dead snail body from the shell.
However, with their big appetite, they would look for soft leaves plants or disturb the smaller fish if they were hungry. I used to see they damage the star grass leaves and even climbed on Oto catfish and tried to grab them away!
That was how they munched on my delicate star grass leaves. :(
That being said, they would remain calm and peaceful should the tank has enough algae and food supply. So, if you see your Amano Shrimps keep running around and damage the plants or disturb other fishes, that means mostly they are hungry and looking for food. Just give them a slice of blanched zucchini or some smashed green pea, they will be alright. Hungry shrimps is angry shrimps! :)