From the archive record
Fiddler crabs burrows on the mudflat to refuge during high tide, and during low tide it is a source of water for keeping the gills wet, it is an escape from predators and it is the site of mating and incubation. Male fiddler crab have a single enlarged claw, while females have two small feeding claws. Fiddlers feed by scraping the surface sediment up in their small claws, transferring it to the mouth where the complex mouthparts sift out the organic matter. They then spit out a small pellet of cleaned sand. These feeling pellets cover the mudflat by the end of the low tide period. Because males have only one small, feeding claw, they feed at half the rate of the females. They therefore have to spend about double the time feeding. A fiddler crab, sometimes known as a calling crab, may be an