Climate change is driving sardinella, Senegal's most consumed fish, to migrate northwards, leading to a significant decline in their numbers in local waters. This shift is causing challenges for local fishermen and threatening food security in West Africa. A study published in Scientific Reports reveals that the warming of north-west African coastal waters is altering the distribution of small pelagic fish, with sardinella migrating at a rate of 181 kilometres per decade. The research underscores the need for improved monitoring to comprehend the effects of climate change on the marine ecosystem off north-west Africa.