<a href=showthread.php?s=&postid=9093123#post9093123 target=_blank>Originally posted</a> by Reef Junkie
Try using a crab trap instead.
A glass jar, with food tied to a rock inside it. Place it upright and lean it up against the rockwork. Be sure to do this after the lights go out, otherwise your fish will make short work of the bait.
The crab climbs in, but can't get out.