Fiddler crabs (Uca spp.) have an important role in maintaining the balance of the food chain and nitrogen cycle in mangrove ecosystems. The Tanah Merah Village community utilizes mangrove wood in their daily lives which can damage and loss of mangrove vegetation ecosystems. Mangrove damage can cause loss of habitat for various types of aquatic biota, one of which is the fiddler crab. This study…