Two nippers on the one hook will attract any passing bream. Don't break off the large nipper on the yabby as the bait will look unnatural, but remember to keep your fingers clear of that big nipper as it can give you a painful squeeze. These little beauties are usually seen in their hundreds on any protected beach. As you approach they march away in unison and then slowly dig themselves into the sand for protection. All you have to do is scrape away the first few inches of sand where you know a crab is hiding and then put all captured crabs in a bucket.
Soldier crabs tend to share the same habitat as nippers.
Have a small amount of water and sand in the bucket so they can bury in, which will keep them alive much longer. Keep their captive environment cool by replenishing the water and, as with all live baits, keep them out of the direct rays of the sun. Either rig the crab whole on the hook by feeding the point of the hook in and out through the soft leg sockets where it joins the body, or cut the crab in half and feed the hook through the body. Crushed up and mixed with chook pellets, soldier crabs make a very good natural berley. Soldier crabs are a top natural bream bait and you will find that flathead are also quite partial to this little marcher.