Tom Michael Fenchel (born 19 March 1940, in Copenhagen) is a Danish marine ecologist and professor first at the University of Aarhus, later at the University of Copenhagen.
He is a highly cited scientist[1] and known for, among other things, Fenchel's Law.
Fenchel holds PhD (1964) and Doctor of Science (1969) degrees, both from the University of Copenhagen.
He is a foreign member of the Royal Society[2] and a reviewing editor of the scientific journal Science.
He served as president 2004-2008 of the Royal Danish Academy of Sciences and Letters (he has been a member since 1976).