[Nelumbo74]

Yes, they are supposedly a species of Machrobrachium, and they are also supposedly predatory. I have heard from people who have lost small, slower fish to them, i.e. neons and cardinals. They look a lot like a ghost shrimp, but they get quite a bit larger.

 

[Nelumbo74]

I just did a Google search and found this:

http://www.petshrimp.com/discussions/viewtopic.php?f=2&t=2933&p=26799