David Sims (born 1969) is a British marine biologist known for satellite tracking sharks and the Global Shark Movement Project.
He is Senior Research Fellow at the Laboratory of the Marine Biological Association (MBA) in Plymouth, and a Professor of Marine Ecology in the National Oceanography Centre Southampton at the University of Southampton, U.K.
He works in the field of animal ecology researching movement, behaviour and dispersal processes of sharks.
Research has estimated global spatial overlap of sharks and fisheries, identified common patterns of behaviour (scaling laws) across phyla and informed conservation of threatened species.