How to catch Crabs?

[ati70cutlass]

i got rid of a gorilla crab a few weeks ago. yesterday i found a pincher of another. now my fish seem to be dying one by one. for the most part they are only the smaller fish, less than an inch. anyone know a way of catching a crab?

 

[musicman1968]

cut the neck off a 2 liter bottle and insert into the body of the bottle like a funnel. Bait trap with something crab loves. This also works for small fish. Just have to make sure hole is cut big enough for him to get into. Image search minnow trap and you'll get an idea what I mean.