Questions on Red Devil and Vampire crabs

[RedBellyRhen]

First off are either aggressive, and are they aggressive? I have a fire belly newt named Charizard and i wanted to get him a friend, i was wondering if either of those crabs would be a good friend for him and if not what other crab would be. Or if a crab is just a bad idea to have in a tank with him.

 

[RedBellyRhen]

First off are either aggressive, and are they aggressive? I have a fire belly newt named Charizard and i wanted to get him a friend, i was wondering if either of those crabs would be a good friend for him and if not what other crab would be. Or if a crab is just a bad idea to have in a tank with him.

Opps ment to say up there if they lived in brackish water or not and if they were aggressive xP