waterlilly
Aquarium Advice Activist
They are called Red claw Shrimps and they are very uncommon in the US her is a site about them http://www.petshrimp.com/redclawshrimp.html here is a semi good picture of one of them
Becareful because anything with claws will try to capture your fish. It says on that page " they can get a hold off and even clip off parts of the fins of fish when they are asleep at night "
I had indian prawn that ganged up on my goldfish (3 to one) and had him pinned to the gravel... if I hadn't of scared em off they prolly would have killed him
so just be careful =o)