Warmer waters, slower fish
It is unclear whether fish body size will decrease with future warming and, if so, what the ecological consequences of such changes will be. Writing in this issue of Nature Climate Change, Jorge Avaria-Llautureo and colleagues use phylogenetic data to show that, over the past ~150 million years, smaller fish occurred in warmer waters, moved shorter distances at low speed and had low speciation rates. Fish moved faster and evolved more quickly under periods of rapid change, which has implications for movement and survival under current climate change.
See Avaria-Llautureo et al. and Flannery-Sutherland