Having A Problem With Ghost Shrimp

[214jay]

Hello.  I introduced two shrimps yesterday sold to me as Ghost Shrimps.  Soon after they went in the tank one was peaceful and the other was trying to catch the Dwarf Gourami and other fish.  Having done more research, it turns out he was a Macro (does have huge claws!!).  I have managed to remove him before he does any more harm.  I have a second tank (48L) that I am keeping as dedicated shrimp tank, would he be okay in there with a mix of shrimps?
 
My second question.  The 2nd shrimp today appeared to be shoaling with my rummynose tetras which was frightening them, he did not seem to be hunting them but definitely swimming with them then running up the side of the tank! Have you any ideas why he would be doing this? Is it normal behaviour?
 
Many thanks!

 

[the_lock_man]

If you do a Google Images search for Macrobrachium Shrimp, you will see the size they get to. I would return the little blighter as soon as you can. I don't think your other shrimp will be safe.
 
I don't think the 2nd shrimp was particularly trying to shoal, I would imagine it's more showing signs of stress, due to the move, (and probably spending a while trapped in a small plastic bag with a psychopathic killer), give it a while to settle in to its new home.

 

[214jay]

My worry is that the second shrimp might turn out to be one of these psychopathic killers also.  Unfortunately pets at home do not allow returns on fish so not sure if I will have much luck!

 

[fm1978]

If it was sold to you as a Ghost and turns out to be another species then you have reason to return it and they have reason to take it back!