Notation “X: Y” (effect of Y on X) refers to using X and its lags to cross-map to Y variable with time lag l. Plots show mean-cross map skill (rho value) over 100 random libraries. The sea surface temperatures have delayed effects on landings with an optimal CCM lag ranged from -2 to -4 months (landings: SST). The landings indicator is useful for directly predicting the mega-spawners, with an optimal CCM lag of 2 months (mega-spawners: landings).