Ludwig Karl Schmarda (23 August 1819 – 7 April 1908) was an Austrian naturalist and traveler, born at Olmütz, Moravia.[1] In 1853 he published a pre-Darwinian work, Die geographische verbreitung der thiere, on the geographical distributions of animals which looked at both marine and terrestrial environments. He was a specialist on marine invertebrates, especially the polychaetes.