For the love of fish, nature and people: A tribute to Professor Louis Bernatchez (1960–2023).

Professor Louis Bernatchez, a renowned figure in genomics applied to the conservation and management of aquatic resources, has passed away at the age of 63. He was the Editor-in-Chief for Evolutionary Applications and made significant contributions to the journal. Professor Bernatchez's work focused on microevolution's role in macroevolution using sympatric Lake Whitefish species pairs, and he emphasized the integration of molecular genetics and ecology. His legacy includes advancements in phylogeography, functional genomics, and conservation genomics, and he was highly active in fish research with Indigenous communities in Canada. The text is a collection of personal reflections and tributes to Professor Bernatchez, highlighting his mentorship, support, and contributions to the field. The authors celebrate his lasting impact on the scientific community and express their sadness at his passing. [Extracted from the article]