Our study about the adaptation of tropical rainbowfish is the cover and editor’s choice for this month’s issue of Heredity! Great photo by Keith Martin Click here for open access PDF of the paper. Reference: Gates K, Sandoval-Castillo J, Brauer C, Unmack P, Laporte M, Bernatchez L, Beheregaray LB (2023). Environmental selection, rather than neutral processes, best explain regional patterns of diversity in a tropical rainforest fish. Heredity doi: 10.1038/s41437-023-00612-x