Watch LookMovie. Inspired by Rachel Carson’s 1955 book The Edge of the Sea, this short film is a cinematic ode to the myriad forms of marine life on the intertidal mudflats of Karachi. Between the ebb and flow of tides, the city’s exposed shoreline is home to a fish that walks on land, the mud crab that clings tenaciously to mangrove tree trunks, the mighty periwinkle, the bubbler crab that spits out sand balls and many other fascinating creatures. In and around mangrove forest creeks, amidst steaming vessels and a new skyline, the film takes you on a silent journey through a delicate wetland ecosystem on the shores of an industrial city that might soon disappear.