Jean Bouillon (20 December 1926 – 29 March 2009) was a Belgian marine biologist and expert on Hydrozoa.
He worked from 1955 to 1991 as a professor at the Université libre de Bruxelles.
From 1975 to 1994, he was the founder and director of the King Leopold III Biological Station at Laing Island, Hansa Bay, Madang Province, Papua New-Guinea.
He was also a member of l’Académie royale des sciences d’Outre-mer.
[2] His last publication, the modestly named "An Introduction to Hydrozoa", is the standard work on this group of animals.