Within the Brazilian mangroves resides some of the most unique organisms on Earth: killifish. Specifically, two species within the genus Kryptolebias, which are the only known vertebrates to reproduce through self-fertilisation. What impact does this unusual mating system have on their population genetic structure? Dr Waldir Berbel-Filho ventured into the inhospitable mangroves to discover the answer.
Associated article: More than meets the eye: syntopic and morphologically similar mangrove killifish species show different mating systems and patterns of genetic structure along the Brazilian coast
https://www.nature.com/articles/s41437-020-00356-y
