Well I saw the first one at the LFS and decided I liked it, but it was kind of expensive so I passed on it and some one else bought it. A few weeks later they got in a pair of smaller ones that were less expensive, so I bought one. I haven't seen another one since, and I’ve been checking because I would like a male female pair.
I did a ton of searching on the net for info, but found very little. Their scientific name is Atyopsis gabonensis and other common name is Cameroon Armored Shrimp, their temperature range is about 70 – 80* F, and they can get up to 6” long. I have hard water (well water) and he seems to do fine in it.
He spends almost all of his time sitting in the current with his mitts open feeding. I feed him a mix of powdered fish flake and brine shrimp. He doesn’t catch much of it so the excess food led to a large pond snail population, but I don’t mind because I can just feed the extra snails to my loaches.
If the fish or frogs get too friendly with him he will stomp on them/stab at them with his front legs, which have a spike on them, but I don’t think he could actually hurt the other fish.
Well that’s about all I have, hope that helps.