Pierre Marie Arthur Morelet (26 August 1809 – 9 October 1892) was a French naturalist, born in Lays, Doubs.
He was a member of the Commission to Algeria, primarily as a natural artist, drawing any natural findings.
He had a particular interest in molluscs, particularly the molluscan species of Africa, and published many works on the topic.
Morelet married Noémie de Folin, sister of Léopold de Folin.