crab/creature in my sump

Thats a pretty sweet crab, vibrant. I'd def keep him.

Generally speaking, when someone says marine, their talking about a fowlr, generally. I would be surprised if a lot of people refer to their reef tanks as marine tanks. Tangster just jumped on it and said, get rid of it. Can't always assume that everyone on the site has a reef. As long as that thing doesn't mess with his fish (by the size it probably will), it would be cool to keep in his display.

It has sharp claws....not good.

 

that thing is sweet. if its in your sump then id leave it there as a "secret" pet

 

I stand corrected , forget I said anything But for what its worth and its free I have personally seen many a cool looking crab that hitched hiked in on some rock or sand eat some pretty sweet fish and all the other crabs in the system..
I sat one day and watched a sweet crab take out every emerald crab the guy had crunch right into about the size of a dime when he first saw it but it looked sweet so he allowed it to stay next time he saw it I saw it and it was a shamed faced crab had to tear the entire tank down to get it out .It ate fish as well . If you have to ask toss them is my motto But thats just me , The reason I said toss it is because by time you get the answer it could already eating something worth far more ..

 

true that! in a reef tank GET IT OUT, in a fowlr think before acting because most fowlrs consist of larger fish and considering it was already in your display for 2 months before you noticed it, then its probably not as eminent to remove it.

So is red mirthrax 100% confirmed ID? I didn't see any with such vibrant of colors on google images. Any other ID suggestions?

If you setup a custom tank for that thing, you better make a build thread.

 

if its in his sump then whats the problem?

 

There is none. A few of us missed that part before we posted

 

Yea, I've got a mantis shrimp in my refugium. I'm kind of afraid to put my hand where I can't see it. SNAP!!!

 

Definitely not an emerald. See that claw structure? That there is for tearing through meat, not algae
I have no idea on exactly what type it is. But since it's in your sump just let it be. It will help clean up the detritus and uneaten food. I doubt it will get very big at all.

 

i do have a sump and it is in my sump.!!!

i might just leave it be for now. can anyone ID this crab?

 

Can you get a picture of it showing the top of the carpace facing down? Where did your rock originate from?