Otto Marseus van Schrieck (ca. 1619, Nijmegen - buried June 22, 1678, Amsterdam) was a painter in the Dutch Golden Age.
Marseus van Schrieck spent the years 1648-1657 in Rome and Florence with the painters Matthias Withoos and Willem van Aelst, after which he settled in Amsterdam. He is best known for his paintings of forest flora and fauna. In Arnold Houbraken's biography of him, he mentions that he joined the Bentvueghels in Rome and was called the snuffelaer, or "sniffer", because he was always sniffing strange lizards and snakes. He quotes his wife, who apparently survived him by two husbands and was still alive when he wrote the book. He wrote that she said that Otto kept snakes and lizards in a shed at the back of his house, and also on a piece of land outside the city that was walled in for this purpose.