Is this a good crab or bad crab ?

[bok]

Finally, I managed to capture/kill this crab today morning when I turned on the lights. The crab wasn't so quick and I teared the outer shell off. Then I pulled him out.
It has a hairy legs and shell, a bigger claw and a smaller one and the claws are pointy.
I chase him a whole year and every time he figures a way out behind the rockscape. Till now!! :angryfire:





Thank you!

 

[Reefer54]

bad crab. big claws (not to say that all crabs with large claws are bad, but its a good rule of thumb for crabs) good work....so to speak, bummer you had to kill it. woulda been great in the sump.

 

[bok]

I did't meant to kill it, but I grabed him by the outer shell and he didn't want to let go.... So I ripped the shell appart when I pulled him up.

 

[Sugar Magnolia]

It's a species of xanthid. Bad crab.

 

[K Daddy]

Bad crab, Pointy claws... Throw it in the sump if you have one!

 

[J2T]

Bad crab, Pointy claws... Throw it in the sump if you have one!

lol he is kind of dead now it appears...unless you have something to feed in the sump won't do much good in there

 

[smkkib]

Can some one explain why this type crab Bad?

 

[Calappidae]

Can some one explain why this type crab Bad?

By the looks of those claws, my guess would be very aggressive and not reef safe.

 

[Cancros Amo]

Hi, I'm very new to aquarium life, and exclusively have crabs. When people use the term reef safe, about crabs, what exactly do you mean? It's unlikely to kill other crabs? Fish? Plants? Please let me know!

Dan

 

[Calappidae]

Reef safe means it won't eat your corals. With caution means it might attack or terrorize corals if underfed or to close to them. Not reef safe means it will more then likely destroy every coral in the tank.

 

[Cancros Amo]

Thanks for such a clear answer! Much appreciated!

 

[wyattroa]

curious why people throw these guys in their sumps? Would it make a difference if you run filter socks?

 

[Calappidae]

curious why people throw these guys in their sumps? Would it make a difference if you run filter socks?

When we find a cool hitchhiker like crabs, mantis shrimp, etc etc it's a waste to kill them as they are pretty interesting and worthy of keeping in their own little compartment. Refugiums/sumps are usually where we would place things that don't belong in the main DT until we find a proper home or just leave it in there.

 

[Flameangel2000]

I found this on my live rocks and left it to grow in my main tank.
http://www.ultimatereef.net/uploader/2010Q1/small 0001mythrax.jpg

 

[Tzwizzle]

There's a lot of potentially bad things crabs can do such as kill your fish while they sleep on the bottom, eat your corals, murder other inverts, burrow into your live rock ect. Seems like there's only a handful of crabs that add any benefit to the reef tank. Most need to be kept an eye on and when caught it's best to put them in the time out zone aka sump to avoid any future damage.