Stephanie Yin, from Mark Bertness's lab (http://bertnesslab.com/) at Brown University, tells the story of how marshes in New England have died back as populations of the crab Sesarma
have grown. Visit http://creaturecast.org for more stories about the unexpected world of Biology. The hand-drawn animations were photographed at the Brown University Science Center (http://brown.edu/academics/science-center/). Music by Oyster Bay (http://oysterboy.bandcamp.com/).