The brown ghost knifefish of South America can generate electric signals – and they seem to use them to develop and maintain a sophisticated social hierarchy Source: https://www.newscientist.com/article/2268008-knifefish-use-electric-fields-to-develop-a-complex-social-hierarchy/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home…