..this was one skittish crab we chased around unsuccessfully with a macro lens mounted to a dslr, after a few feet, we gave up and used the p&s instead.. it was about the size of a thumbnail.. can’t say what type of crab it was though.. 
..this was one skittish crab we chased around unsuccessfully with a macro lens mounted to a dslr, after a few feet, we gave up and used the p&s instead.. it was about the size of a thumbnail.. can’t say what type of crab it was though..