A feisty fiddler crab patrols the salt marsh. GERRY BEETHAM PHOTOS On the right day, you can see hundreds of fiddler crabs (or more) at the edge of a salt marsh. Previous Next Feisty scuttlers everywhere! Those fiddler crabs seem to be pretty busy, and you get the idea that they aren't thrilled when you interrupt them. Could they team up and untie your shoelaces? Probably not, but let's take a closer look at these crusty crustaceans, so we're prepared the next time we walk along a salt marsh.