How to catch crabs?

[dmf]

Does anyone have any good tips on how to catch crabs in the tank. They have become a nuisance by knocking off corals.

 

[SeanT]

Get a drinking glass. The taller the better.
Rinse it very well.
Get a piece of raw shrimp.
Lower the glass into your tank, leaning agaisnt a rock, make sure it is at an angle so the crabs can crawl up the rock and itno the glass.
Put the shrimp in the glass, make sure no powerheads are going to blow into the glass.

And wait.

The crabs will come.

hth,
Sean

Also
[welcome]

Do it after lights out

 

[GS-Rock]

great idea about the glass, when the crab falls into the glass, it will not be able to walk out of it because it cant get its foot to hold on the glass, so i guess the glass needs to be set up at a steep angle