Asap need a wayvto catch a few crabs

[nanomania]

I just built a new macro tank, and there are some crabs that came along with the live rock. The are eating my macros, and its extremely difficult for me to remove the rocks.
Is there any method of removing them without disturbing the aquascape?
Also worried, that they might kill my fishes in future, they a small as of now.

 

[jp_75]

Following! I believe one of rhe crabs is after my corals! Tried glass cup with putting some food in but my fish steals all...

 

[nanomania]

I just have a single mandarin

Following! I believe one of rhe crabs is after my corals! Tried glass cup with putting some food in but my fish steals all...

 

[Maritimer]

In your case then, a glass or jar with some frozen/thawed fish food at the bottom, leaned up against one of the rocks, may tempt the crabs to take the easy slide to the bottom ... only to find that returning to the safety of the rocks will be far more difficult!

~Bruce

 

[nanomania]

I left it like that for 24hrs, but no luck..

In your case then, a glass or jar with some frozen/thawed fish food at the bottom, leaned up against one of the rocks, may tempt the crabs to take the easy slide to the bottom ... only to find that returning to the safety of the rocks will be far more difficult!

~Bruce

 

[nanomania]

Help

 

[mfinn]

I've successfully used the food in a jar several times.
I use a baby food jar and a piece of shrimp.
I rubber band the shrimp to a small piece of rock ( or anything heavy)
Place the jar at a 45 degree angle leaning up against the live rock in the tank. Helps to try and place it near where you think the crab is.
This may only take one night, or it may take 10 nights and you may have to re-bait the trap every day. But if you keep at it, you probably will get it.

 

[nanomania]

Great will do that. Would an open clam work?

I've successfully used the food in a jar several times.
I use a baby food jar and a piece of shrimp.
I rubber band the shrimp to a small piece of rock ( or anything heavy)
Place the jar at a 45 degree angle leaning up against the live rock in the tank. Helps to try and place it near where you think the crab is.
This may only take one night, or it may take 10 nights and you may have to re-bait the trap every day. But if you keep at it, you probably will get it.

 

[mfinn]

Great will do that. Would an open clam work?

It may, but you still have to weight it down.
I was thinking one time about trying to block off part of the opening of the container so fish couldn't easily swim in and grab the food, but I got lazy and just waited.

 

[nanomania]

It may, but you still have to weight it down.
I was thinking one time about trying to block off part of the opening of the container so fish couldn't easily swim in and grab the food, but I got lazy and just waited.

Fortunately he was out and about, so was abke to net it. But something is still eating my plants.. need to fig out asap