Thanks for your comment and for paying such close attention! It's hard to see, but horseshoe crabs do indeed have seven pairs of legs. The seventh pair, called the chilaria, very small "remnant legs" that are up under the middle of the shell. They are difficult to see, but are labeled in this diagram of the crab's underside from the University of Delaware's SeaGrant Program.
Thanks for your comment and for paying such close attention! It's hard to see, but horseshoe crabs do indeed have seven pairs of legs. The seventh pair, called the chilaria, very small "remnant legs" that are up under the middle of the shell. They are difficult to see, but are labeled in this diagram of the crab's underside from the University of Delaware's SeaGrant Program.
Submitted by Ocean Portal Team on Mon, 11/08/2010 - 6:54pm.