Active days, longer life: a fish’s behavioural clock predicts lifespan
Scientists tracked 81 African turquoise killifish from adolescence to death with 24/7 video and a machine-learning model, finding that more active, faster-moving fish tended to live longer and those that slept mainly at night also reached older ages, while daytime napping correlated with shorter lifespans. The study suggests early-life behaviour can forecast ageing long before disease signs emerge.