Before you blame pollution, some say this claw could be a natural phenomenon.
A Reddit user was cracking Chesapeake Bay crabs this weekend when he came across this claw. “Scuba Steve” posted the picture which has drawn more than a thousand responses.
Danny Clemens with Discovery.com found a possible explanation: crabs consistently molt out of their shells (becoming soft-shelled crabs for a time) and if something goes wrong — such as losing a claw — during that time, they’ll grow a new one. Sometimes the DNA gets mixed up and they grow an extra claw.
As one Reddit responder pointed out, “Looks like the little one makes a good bottle opener.”
— Discovery (@Discovery) August 17, 2015