The term fiddler crab refers to around 100 species and subspecies of crabs from the genus Uca. They are found along beaches and brackish (a mixture of saltwater and freshwater) waterways around the ...

David Johnson: So in 2014, we were on a muddy bank in the marsh up here in Massachusetts, and I saw this small crab scuttle across the mud bank and pop into a hole. And so I dug out the crab, and it ...