Are these really Ghost Shrimp? We got four of them along with 4 Cherry shrimp. These are pictures of two different shrimp that are about 1.5 inches long. We have a smaller one about 1 inch long. The fourth one, which is hiding from me right now, has grown to about 2.5 to 3 inches long. And that's not counting the antenna length. I thought they were only supposed to get 1.5 inches max. Now we can only find one Cherry shrimp and what looks like a partially eaten one on the filter intake. I'm worried that these are not really Ghost shrimp and may be hunting the Cherries. my wife swears the big one looked like it was trying to catch a couple of our small Neon Tetras. any opinions on this?