Effects of ocean acidification on the embryos and larvae of red king crab, Paralithodes camtschaticus

► We examined the effect of ocean acidification on red king crab embryos and larvae. ► Acidified water increased the size of embryos while decreasing yolk size. ► Hatch duration was increased under acidification but fecundity was unchanged. ► Larvae from acidified embryos were longer and had reduced survival. ► Calcium content was increased in both larvae and females in acidified water.