Found this specimen in the Peace River, FL last week. I almost tossed it thinking it was a piece of modern bone but then decided to try and ID it. I have not been successful on my own - maybe looking in the wrong place? The only thing it resembles, to my eyes, is a crab claw. It is hollow and measures 21mm long X 11 MM at its widest. The black portion appears to be enamel. Maybe the tip off a modern crab claw? Any help would be appreciated. Thanks!