Since the 19th century, biologists have treated the larvae of lampreys as a relic of evolutionary ancestry that could potentially give clues about vertebrate origins. Now fossils overturn that view.
Young fish need to find food to grow, but avoid being eaten themselves. That dance for survival is linked to moonlight, which has implications for fisheries management everywhere.
Fish larvae will swim towards the sounds of a desirable reef, but degraded reefs cannot be rebuilt on sound alone.