Crab! What Crab!?

[causeidm]

I recently found a red crab in my reef tank, it's small, all red, with a blue belly, anyone know what type of crab this is?

 

[lubbockfishdude]

Sounds like you have yourself a red-blue fiddler crab. Do a yahoo search on them to find out more info. I had one and it died when moving to a enw tank. Must have acclimated too quickly. Before that though, he was rarely seen and moved slow.