In February 1999, the Environment Agency (the present-day Environment Ministry) shocked the nation by designating the all-too-familiar “medaka” killifish as an endangered species. That was exactly a ...

Tokyo police on March 8 arrested five men on suspicion of illegally breeding and selling killifish that were genetically modified to make them “red and shiny.” Genetically modified organisms can ...

image: There may be plenty of fish in the sea but the medaka knows what it likes. A new study published in the open-access journal BMC Biology shows how a single gene mutation that turns Japanese ...