Koen Fraussen (born 1965)[1] is a Belgian amateur malacologist, shell collector, and expert in the Buccinoidea.
[3] Fraussen is a part-time bus driver who also studies whelk shells for the Muséum National d'Histoire Naturelle.
[3] Philippe Bouchet considers Fraussen "the world expert" on the Buccinidae.
[4] In 2010, Fraussen and biologist Stefaan Wera released the book Schelpen aan de Belgische kust.
[5] With the Muséum National, Fraussen published 20 new species of the Photinae (subfamily of the Nassariidae) as of 2017.