It happens around the globe every day, sweeping through the world's oceans in a massive living wave as twilight zone inhabitants travel hundreds of meters to surface waters to feed at night and return to the relative safety of deeper, darker waters during the day.
Acontece no planeta todo, todo dia, varrendo os oceanos do mundo numa onda maciça viva, conforme habitantes da zona sombria viajam centenas de metros para submergir, se alimentar à noite, e voltar à segurança relativa das águas mais profundas e escuras durante o dia.