13" x 19" and 15" x 23" Blue Lobster Nautical Decor Hidden Zipper in Back Linen with Feather Down Fill and Sunbrella with Faux Down Poly Fill Knife Edge or Corded Finish Info Tag Includes: Lobsters navigate by smell, taste with their feet and listen with their legs. Their brains are in their throats, and, like crabs, their teeth are in their stomachs. As they grow, they molt or shed their shells several times to form new shells to fit their growing bodies. This process takes place every 2-4 weeks.