[AaronT]

My LFS carries these too and they look to be Macrobrachium sp. 'Red Claw'. They get about 3" long and breed readily in the aquarium. They're quite fun to keep, though they will fin nip fish. They eat snails too. You can keep top dwelling fish like rainbowfish without any issues as these "Whisker Shrimp" will stay on the bottom of the tank.